Indo-Pacific Studies Center
Strategic Brief · Issue #001
Indo-Pacific Strategic Dynamics
Indo-Pacific Chokepoints
August 2026 Edition
From Episodic Pressure to Durable Presence
RC03 PhilippinesRC04 JapanRC05 Cross-StraitRC06 IndoPacific SecurityRC07 Maritime Corridors
Bottom Line Assessment
Aggregate indicators for July 2026 sit among the highest months on record across magnitude composition, sub-threshold activity, and high-intensity signal share, yet this elevated baseline was already the cluster's direction of travel — the standout development is the coincidence of a publicly acknowledged PLAN SLBM full-range test, CCTV-released footage of a reported YJ-20 hypersonic anti-ship missile launch from a Type 052D (first known official depiction per Janes, unverified as live-fire), a physical baton clash at Second Thomas Shoal, and a structural Hormuz re-closure loading Indonesian archipelagic lanes simultaneously, compressing multiple axis-level stressors into a single calendar month.
Indo-Pacific chokepoints are the circulatory system of global energy and trade flows, and the cluster captures the intersection where Chinese military posture, grey-zone maritime coercion, and extra-regional disruptions interact to generate compounding strategic risk. July 2026 concentrates that interaction across the Luzon Strait–Bashi Channel, the Taiwan Strait, the Indonesian archipelagic sea lanes, and the South China Sea simultaneously, making the period unusually diagnostic of how Beijing is calibrating pressure across multiple vectors at once. The situation panel does not track military mobilisation or force posture and cannot say whether conflict is imminent; with 54% of signals rated Low or Unstated confidence, the simultaneity observation reflects signal density rather than confirmed operational coordination.
What Changed This Period — and What Did Not
What did not change
- Signal volume: 65 against a mean of 63 (1.03×)
Computed: measures inside their normal range (25th–75th
percentile) against every observed month on the same filters. Stability is a
finding, not an empty result.
What moved — and what may be changing
- Measured: Magnitude 4–5 share: 16.9% against a mean of 10.2% — among the highest months on record for this filter
- Measured: Magnitude-5 share: 3.1% against a mean of 1.8% — among the highest months on record for this filter
- Measured: Escalation share: 27.7% against a mean of 24.4% — above its normal range
- Measured: Grey-zone share: 40.0% against a mean of 32.5% — among the highest months on record for this filter
- CCG presence east of Taiwan may be transitioning from episodic deployment to a continuous, rotational permanent patrol — the 4 July relief-in-place is the first documented rotation of that kind (S57), and a second documented rotation within 90 days would constitute a pattern; failure to rotate or a recall of the task force would kill the hypothesis.
- China may be shifting from covert UUV collection in Indonesian archipelagic lanes to a pattern of deliberate, detectable presence intended to signal undersea access — the IOJI-confirmed tri-device ALKI II deployment (S24) and CCG persistence in the North Natuna Sea (S38) suggest a move from deniable to acknowledged presence; confirmation would require Indonesian authorities publicly attributing a recovered or tracked device to China without Beijing denying it.
- Beijing's academic lawfare asserting sovereignty over the Batanes Islands (S44, state-media) — a claim Beijing's Foreign Ministry declined to endorse or repudiate — may presage a formal administrative or operational claim to the Bashi Channel corridor analogous to the progression from academic to official claim seen in earlier South China Sea disputes; the hypothesis would be confirmed by a PRC MFA statement or PLAN operational order explicitly referencing Batanes, and killed if the academic framing remains unendorsed by official organs.
- Indonesia's strategic alignment may be drifting from its traditional non-alignment posture toward closer engagement with Russia at the expense of US-led multilateral exercises — the decision to skip RIMPAC while deploying the TNI-AL flagship to Orruda 2026 (S16) is a single data point, not a trend; a second consecutive RIMPAC absence or a defence agreement with Russia would confirm the shift, while restored participation in 2027 would kill it.
“Measured” items are computed movements against the
baseline. The remainder are analyst hypotheses this period’s signals raise but
cannot yet establish — one observation does not establish a new practice; each
names the observation that would confirm or kill it.
Percentages describe the composition of the IPSC signal
register and should not be interpreted as the frequency distribution of all real-world
military activity. Rates are robust to duplicate collection of the same event, but not
to changes in collection tasking or centre mix — the denominator is
IPSC-collected signals, not a complete universe of activity.
Key Judgements
Evidentiary base — computed: 65 signals ·
61 unique sources · 31% official documents
· confidence Low 35 · Medium 26 · High 4
- July 2026 is among the highest months on record for this cluster on magnitude composition and sub-threshold activity, indicating that the period is genuinely outside the cluster's normal range rather than merely event-rich — the magnitude 4–5 share and sub-threshold share both reached the upper bound of their 19-month distributions, a combination not explained by any single incident.6 signals cited · magnitude 4×5, 5×1 · RC06, RC07 · 1/6 official documentsConfidenceHighBasisBoth the magnitude 4–5 share (recorded at among the highest months on record per the historical baseline) and the sub-threshold share (also at the upper bound of its 19-month range) are confirmed by the historical baseline block, not inferred from the signals alone; the two metrics moving together strengthens the structural reading over an event-driven one.Would strengthenIf subsequent months sustain magnitude 4–5 share above the 19-month mean without a discrete triggering crisis, that would confirm a structural shift rather than a one-month spike.Would weakenIf the July figures are revised downward on re-coding, or if August returns to near-mean levels across both metrics, the period would revert to an outlier episode rather than evidence of a new baseline.
- Beijing's decision to publish CCTV footage of a reported YJ-20 hypersonic anti-ship missile launch from a Type 052D destroyer's VLS, timed to the PLA's 99th anniversary, is assessed as a deliberate signalling act directed at US carrier operations rather than a routine capability demonstration, because the disclosure was state-media controlled and coincided with USS George Washington's westbound Luzon Strait transit.2 signals cited · magnitude 2×1, 5×1 · RC07 · 1/2 official documentsConfidenceLowBasisThe capability claim rests on a single low-confidence media report drawing on CCTV state-media footage; Janes confirmed this is the first known official depiction of a YJ-20 launch from a Type 052D but the footage has not been independently verified as live-fire by open-source technical analysts; the signalling interpretation is an analytical inference from timing proximity to the carrier transit, not corroborated by an official assessment; the coincidence is suggestive but not conclusive.Would strengthenAn independent technical verification of the YJ-20's VLS integration — by a non-PRC source such as a Janes defence assessment or a US Indo-Pacific Command statement — would elevate confidence in both the capability and the signalling intent.Would weakenIf the CCTV footage is assessed by open-source technical analysts as computer-generated or archival rather than live-fire, the signalling claim would collapse to Beijing announcing a capability it has not yet demonstrated.
- China's parallel escalation across the Taiwan Strait, Second Thomas Shoal, the Senkaku approaches, and the Bashi Channel in July 2026 reflects a deliberate multi-front pressure strategy rather than reactive responses to individual Philippine, Japanese, or US actions — the simultaneity is the signal.8 signals cited · magnitude 2×1, 3×4, 4×3 · RC03, RC04, RC06, RC07 · 4/8 official documentsConfidenceModerateBasisThe assessment rests on corroboration across research centres and geographic sub-clusters within a single calendar month, with official-document and think-tank signals corroborating media reports; however, coordinated intent cannot be inferred from simultaneity alone and the causal claim remains contestable.Would strengthenInternal PRC planning documents or a senior PLA statement linking operations across theatres would confirm coordinated intent; alternatively, a pattern of the same simultaneity in subsequent months would support the structural reading.Would weakenIf each incident can be fully explained by its own local trigger — the ASEAN AMM schedule, the Senkaku fishing calendar, Taiwan's supply-chain drill — the multi-front framing is coincidence rather than strategy.
- The Hormuz re-closure has structurally redirected a reported surge of VLCC traffic onto Indonesia's Sunda, Lombok, and Karimata straits, generating a material sovereignty and maritime domain awareness challenge for Jakarta that Indonesian institutions are not yet positioned to manage at scale.8 signals cited · magnitude 3×4, 4×4 · RC07 · 1/8 official documentsConfidenceModerateBasisMultiple corroborating think-tank, official-document, and market-data signals document the rerouting and Indonesian capacity gap; the magnitude-4 rating on the Hormuz structural rerouting signal and the Australian NDS/IIP undersea response lend additional weight, though the governance-capacity inference is analytical rather than directly sourced.Would strengthenAn Indonesian government statement acknowledging ALKI transit monitoring gaps, or a TNI-AL operational report on increased VLCC traffic density in the Lombok corridor, would confirm the institutional stress.Would weakenIf IMF PortWatch data for August 2026 shows Hormuz transit volumes recovering toward baseline, the ALKI pressure would ease and the sovereignty framing would be overstated.
- Beijing's formal rejection of the 2016 Arbitral Award on its tenth anniversary, combined with state-media publication of academic claims asserting sovereignty over the Batanes Islands, suggests a coordinated lawfare campaign intended to pre-emptively delegitimise Philippine and US denial posture in the Bashi Channel before any kinetic escalation.2 signals cited · magnitude 3×2 · RC03, RC07 · 1/2 official documentsConfidenceLowBasisThe Batanes academic claim originates from a state-media signal (Global Times) and should be attributed to Beijing's information apparatus rather than treated as independent legal analysis; the coordination inference is plausible but rests on two signals with low to medium confidence and no corroborating official-document source; notably, Beijing's Foreign Ministry declined to endorse or repudiate the Batanes claim, which is the strongest available evidence against the lawfare-coordination hypothesis.Would strengthenA PRC MFA or PLAN operational document explicitly asserting rights in the Bashi Channel corridor consistent with the academic framing would confirm the lawfare campaign is operationally linked.Would weakenIf the Jinan University symposium findings are disavowed or treated as academic opinion without state endorsement, the coordinated-lawfare reading is weakened to opportunistic nationalism.
Judgements are assessments, not events. Each is contestable; the
italic note is computed from the signals the judgement cites, not written by the
analyst. The evidentiary line above is computed from the whole signal set the same
way.
Historical Indicators & Dashboard
Situation Assessment — each dimension computed separately, not
collapsed into one score
Coercive pressureGrey-zone (sub-threshold) share is among the highest months on record for this filter (28% escalation, 40% grey-zone/sub-threshold this period)
Domain concentrationMaritimeContestation: 65 of 65 signals (100%), 11 rated magnitude 4–5
Immediate kinetic warningNot assessed. This register does not track military mobilisation or force posture, so it cannot say whether conflict is imminent. A magnitude 4–5 rating is not a substitute for that — it means the signal is strategically significant, not that an attack is coming.
Quarantine or interdiction riskNot assessed. This register does not track naval deployments, legal declarations or shipping disruptions, so it cannot estimate the likelihood of an actual quarantine or interdiction. That call requires a separate, dedicated analysis this document does not provide.
Assessment confidence54% rate Low or Unstated confidence, inside its normal range. 4 of 65 reach High confidence (top-tier source, independently corroborated).
Magnitude measures a signal's strategic significance
(reversibility, scope, novelty), not the probability of imminent conflict.
“Not assessed” rows are outside what this register codes and need a
separate analyst judgement, not a guess.
This Period Against Its Own History
19 months · 2025-01 to 2026-07
· 65 signals this period against a mean of 63
(range 50–79)
Magnitude 4–5
16.9%
mean 10.2%
among the highest months on record
share of signals rated High or Critical impact
Magnitude 5
3.1%
mean 1.8%
among the highest months on record
share rated Critical impact only, the register's top tier
Escalation
27.7%
mean 24.4%
above its normal range
share coded as raising tension or crossing a threshold, as opposed to deterrence, de-escalation or signalling
Sub-threshold
40.0%
mean 32.5%
among the highest months on record
grey-zone activity: signals coded SubThreshold (attributable, deliberately calibrated to stay below armed conflict — e.g. coast guard patrols, cyber operations, economic coercion) or Deniable (attribution contested or refused by the acting state) combined, as opposed to Overt action openly acknowledged and conducted
The label is this period's standing against
19 months of the same cluster on the same filters. Placement rule:
this period's value is ranked against every observed month — at or above the
90th percentile reads “among the highest months on record” (“the
highest” only when it exceeds every month), 75th–90th “above its
normal range”, 25th–75th “inside its normal range”,
10th–25th “below”, at or below the 10th “among the
lowest”. Magnitude-based measures exclude Jan–Mar 2025 from mean and
percentile (coding discontinuity — the same exclusion the charts apply), so
this panel and the charts print the same historical means. Most months sit inside
the normal range — that is the expected result, and it is information.
This Period in Context
Share of each month's signals assessed at the top of the magnitude scale. A within-month rate, not a count — counts rise when a research centre is ingested, rates do not. January–March 2025 are shaded: magnitude 4–5 sits at 13.7–14.8% there against 22–27% for every month after, which is an instrument change rather than a quiet quarter, so those months are excluded from the mean.
SubThresholdDeniable
Share of each month's signals coded SubThreshold or Deniable. The remainder — around 68% — is Overt and is not drawn. Mode records how an action was conducted, not what it was about, so this is a measure of grey-zone tempo rather than of any one domain.
this clusterwhole corpus
Magnitude is computed from these three components, not coded directly. Reading them separately shows whether a cluster scores high because its signals are hard to undo (reversibility), because they touch many parties (scope), or because they are without precedent (novelty). Bars are normalised to each component's ceiling so their lengths compare; the printed figure is the raw mean.
Strategic Synthesis
SLBM test and regional deterrence signalling — an assessment
The reported 6 July PLAN Type 094 SLBM test — assessed by Taiwan as consistent with a JL-2 or JL-3 trajectory, with the warhead impacting approximately 300 km east of Tonga after a reported flight of roughly 7,200–7,300 km (S56, medium confidence, think-tank source) — is China's first publicly acknowledged full-range strategic SLBM test into international waters according to the signal's own framing. The strategic weight of the event is not the raw capability, which US and allied analysts have long attributed to the Jin-class fleet, but the decision to acknowledge it. Japan Defence Minister Koizumi held an extraordinary press conference in Ankara on 8 July on the sidelines of the NATO Ankara Summit and IP4 ministerial meeting, formally internationalising the SLBM concern at a multilateral forum (S48, medium confidence, official document); Koizumi separately disclosed the EEZ live-fire at Farnborough on 20 July and characterised it alongside the joint China-Russia bomber flight and SLBM test as manifestations of deepening military cooperation between China and Russia (S19, medium confidence, official document). Taken alongside the CCTV-released footage of a reported YJ-20 hypersonic anti-ship missile from a Type 052D's VLS timed to the USS George Washington's Luzon Strait transit (S3, low confidence; S13, high confidence), the month's nuclear and precision-strike signalling appears calibrated to raise the perceived cost of US carrier intervention in both a Taiwan and a South China Sea contingency — though whether the signals are coordinated or coincidental cannot be determined from available evidence.
Bashi Channel layered as strategic denial corridor
July 2026 produced an unusual density of signals concentrated on the Luzon Strait and Bashi Channel: footage released on 30 July of a reported PLAN Type 052D operating approximately 105 km northwest of Luzon captured by a US autonomous drone — with the underlying filming occurring on 16 June and public disclosure and AFP verification falling within the July window (S2, low confidence; note S2 explicitly characterises the vessel's presence as within Philippine waters, a legal characterisation embedded in a low-confidence media report), live-fire drills by CNS Kaifeng within Japan's claimed EEZ in the Philippine Sea approach (S27, low confidence), multiple ADIZ penetrations including a reported 19-sortie combined-aircraft operation on 24 July (S5, medium confidence, official document), NAVAREA warning zones north of Luzon (S28, medium confidence), and the Global Times-reported academic claim to Batanes Island sovereignty — a claim Beijing's Foreign Ministry declined to endorse or repudiate (S44, state-media, attributed to Beijing's information apparatus). Individually each signal is within precedent; together they describe a deliberate effort to assert presence, raise transit uncertainty, and introduce legal ambiguity across every approach vector to the Bashi Channel. The implication for US carrier and submarine transit planning — and for Philippine air defence posture in northern Luzon — is that the channel is being layered as a contested rather than permissive corridor, though the pace at which that layering translates into operational constraint remains to be tested.
CCG east-of-Taiwan rotation signals permanence intent
The 4 July relief-in-place of CCG cutters east of Taiwan — the first documented rotation of that kind according to CMSI Note 21 (S57, medium confidence, think-tank) — matters less for the vessels involved than for what the logistics imply: Beijing has invested in the command, sustainment, and crew arrangements needed to maintain indefinite CCG presence in waters that had previously seen only episodic patrols. Combined with CCG Kinmen formation incursions assessed at four occurrences in July maintaining a reported weekly cadence (S45, medium confidence, official document), and Taiwan's Ocean Affairs Council minister warning on 8 July that incremental grey-zone pressure was 'gradually rewriting the Taiwan Strait status quo' (S46, low confidence), the pattern is one of boundary-setting through persistence rather than provocation. Taiwan's first-ever interdepartmental blockade-resilience supply-chain drills in July (S26, low confidence) suggest Taipei is tracking the same pattern and drawing contingency-planning conclusions, though the operational effectiveness of those drills cannot be assessed from the available signal.
Hormuz closure loads ALKI as unresolved variable
The collapse of the US-Iran MOU in early July — attributed to IRGC attacks on LNG carrier Al Rekayyat and two other tankers prompting resumed US airstrikes (S55, low confidence, media report) — reduced reported daily Hormuz transits to approximately 10 against a pre-crisis baseline attributed to IMF PortWatch of 88–130 per day (S11). The structural consequence is that Sunda, Lombok, and Karimata straits are absorbing traffic that Indonesian maritime governance is not scaled to monitor. IOJI's Maritime Domain Awareness Report (S49, medium confidence, think-tank) identifies AIS spoofing, opaque vessel ownership, and UUV activity across Indonesian waters as concurrent stressors; a separate IOJI finding confirmed a reported tri-device Chinese UUV deployment pattern across the full ALKI II corridor (S24, medium confidence, think-tank). Australia's 2026 Integrated Investment Program is reported to include an assessed AUD 94–130 billion for undersea warfare over a decade, with a specific undersea systems component attributed to the UUV activity in the Lombok corridor (S33, medium confidence, official document). Indonesia's decision to deploy its flagship frigate to Exercise Orruda 2026 with Russia while skipping RIMPAC (S16, low confidence) introduces a further alignment signal that complicates the coalition maritime picture precisely when ALKI management requires coordinated domain awareness.
Implications for the Regional Balance
Taiwan
Taiwan faces converging pressure across its maritime perimeter in July 2026. A reported 19-sortie combined-aircraft PLA operation on 24 July including H-6 bombers entered the southwestern ADIZ in a declared joint combat readiness patrol (S5, medium confidence, official document). CCG conducted four Kinmen incursions in July at an assessed weekly cadence (S45, medium confidence). CMSI assesses CCG east-of-Taiwan presence as intended to be permanent following the 4 July relief-in-place (S57, medium confidence). The PLAN SLBM test trajectory was tracked by Taiwan as consistent with a South China Sea launch (S56, medium confidence, think-tank). Taiwan's first interdepartmental blockade-resilience drills suggest Taipei is operationalising contingency planning (S26, low confidence), though the drills' effectiveness cannot be assessed from available signals.
Japan
Japan lodged a formal diplomatic protest over the 19 July CNS Kaifeng live-fire drill within its claimed EEZ (S19, medium confidence, official document), and Defence Minister Koizumi internationalised the SLBM concern at NATO Ankara on 8 July (S48, medium confidence, official document); Koizumi separately disclosed the EEZ live-fire at Farnborough on 20 July (S19, medium confidence, official document). CCG armed vessels entered Japanese territorial waters around the Senkaku/Diaoyu Islands on 7 July and approached a Japanese fishing vessel (S54, low confidence). JASDF scrambled on 6 July in response to Chinese aircraft activity over the East China Sea (S58, medium confidence, official document). The convergence of EEZ live-fire, CCG territorial incursions, and public SLBM acknowledgement within a single month represents an unusual density of pressure on Tokyo, though each incident type is consistent with prior patterns when examined individually.
Philippines
July 2026 represents among the highest months on record for Philippine maritime sovereignty pressure in the cluster period. A baton clash at Second Thomas Shoal on 20 July resulted in a reported serious head injury to a Philippine Navy marine (S23, S25 — S25 high confidence, official document). Both countries summoned each other's ambassadors simultaneously (S20, low confidence). China's MFA issued a formal statement on the 10th anniversary of the Arbitral Award declaring it 'null, void and without binding force' (S42, medium confidence, official document). CCG accumulated a reported 933 ship-days at Scarborough in H1 2026, assessed as nearly matching the prior full-year total (S62, medium confidence, think-tank). The US reaffirmed Mutual Defence Treaty obligations in response to the Second Thomas Shoal clash (S25). Philippine institutional responses included a new DOJ maritime law unit (S39) and DND pledges of sustained WPS deployment (S29).
India
India's strategic footprint in the cluster is represented primarily by the 6–8 July Modi visit to Jakarta and the agreement to jointly develop Sabang Port on Weh Island off northern Sumatra, covering the western Malacca Strait approach (S52, medium confidence, official document). The Sabang agreement positions India at the entrance to the Malacca Strait and is assessed as responsive to the broader chokepoint competition, though the signal does not specify a timeline or investment quantum, limiting further inference. No additional India-specific signals appear in the July set; the Sabang development remains the sole direct Indian actor signal and should not be extrapolated beyond what S52 states.
US and Allied Force Planning
US force posture in the cluster is visible through USS George Washington CSG's westbound Luzon Strait transit on 22 July (S13, high confidence, official document), the USNS Henson survey vessel reported southwest of Penghu during heightened activity (S17, low confidence), and the 17th US-Philippines-Japan Multilateral Maritime Cooperative Activity running 21–25 July (S18, medium confidence). The US MDT reaffirmation following the Second Thomas Shoal baton clash (S25, high confidence) represents the clearest allied commitment signal of the month. Australia's assessed AUD 94–130 billion undersea warfare investment over the decade 2026–36 (S33, medium confidence, official document) is directly attributed to Chinese UUV activity in the Lombok corridor. Indonesia's RIMPAC absence (S16) and the India-Indonesia Sabang agreement (S52) both affect the allied maritime architecture around Indonesian straits.
Watch Items & Signposts
- Monitor whether a second documented CCG relief-in-place east of Taiwan occurs before end-September 2026 — confirmation would shift the CMSI 'intent to normalise' assessment (S57) from hypothesis to established pattern and would have direct implications for Taiwan Coast Guard rules of engagement in Pacific waters.
- Track whether any PRC MFA statement, PLAN operational notice, or official Chinese map publication explicitly references navigational rights or administrative jurisdiction in the Bashi Channel in terms consistent with the Batanes academic claims reported in Global Times on 9 July (S44) — such a statement would confirm lawfare escalation from academic to official tier; note that Beijing's Foreign Ministry has so far declined to endorse or repudiate the academic claim (S44), which is the strongest available evidence against the lawfare-coordination hypothesis this watch item is designed to test.
- Watch IMF PortWatch daily Hormuz transit data for recovery above 40 transits per day — if transits remain below that threshold through September 2026, structural VLCC rerouting via Lombok and Sunda will consolidate, and Indonesian ALKI governance capacity will become a primary strategic variable rather than a secondary one (S11, S43, S55).
- Monitor whether an independent technical assessment — by Janes, IISS, or a US government source — confirms or disputes the VLS integration of the YJ-20 as depicted in the CCTV documentary footage (S3) — confirmation would validate the anti-access implication for US carrier operations in the Luzon Strait; a finding of computer-generated or archival footage would reduce the disclosure to an information operation without demonstrated capability.
Collection Methodology, Coverage & Limitations
MaritimeContestation.ChokepointControlAndTransitMaritimeContestation.CoastGuardAndMilitiaOperationsMaritimeContestation.MaritimeConfrontation
RC03 Philippines
8
signals · max mag 3
CoastGuardAndMilitiaOperations · MaritimeConfrontation
RC04 Japan
4
signals · max mag 3
CoastGuardAndMilitiaOperations
RC05 Cross-Strait
5
signals · max mag 4
CoastGuardAndMilitiaOperations
RC06 IndoPacific Security
2
signals · max mag 4
ChokepointControlAndTransit · MaritimeConfrontation
RC07 Maritime Corridors
46
signals · max mag 5
ChokepointControlAndTransit · MaritimeConfrontation
Domain Breakdown
MaritimeContestation
65
100%
Share of this brief's 65 signals by top-level domain.
Attribution — actor → target
China → Philippines
18
35%
China → Taiwan
10
20%
Philippines → China
3
6%
China (no stated target)
3
6%
China → Japan
2
4%
China → Australia
2
4%
Taiwan → China
2
4%
US (no stated target)
2
4%
China → US
2
4%
Japan → NATO
1
2%
Japan → China
1
2%
Philippines → Japan
1
2%
India → China
1
2%
US → China
1
2%
Russia (no stated target)
1
2%
Russia → US
1
2%
51 of 65 signals carry a stated actor · who is directing activity at whom, among what this brief covers, not a claim about the theatre as a whole
How to Read This Brief
Magnitude — computed
Magnitude is not judged directly. It is the sum of three coded components, banded 1–5. Hover a magnitude pill to see its components.
Reversibility1 reversible · 2 costly · 3 irreversible
Scope1 bilateral · 2 sub-regional · 3 regional · 4 systemic
Novelty1 routine · 2 variation · 3 first observed
5sum 9–10
4sum 7–8
3sum 5–6
2sum 4
1sum 3
Strategic Effect
SignallingCommunicates intent or resolve
DeterrenceDesigned to prevent adversary action
CapacityDisplayDemonstration of existing or growing capability
EscalationRaises tension or crosses a threshold
DeEscalationReduces tension or creates off-ramps
MixedOrAmbiguousCross-cutting or unclear primary effect
NotAssessedEffect not assigned
Mode — how it was conducted
OvertAcknowledged, conducted openly
SubThresholdAttributable, calibrated below armed conflict
DeniableAttribution contested or refused
Mode is a property of conduct, not of subject matter. Only non-Overt modes are tagged in the timeline.
Capability · Intent · Leverage
CapabilityWhat an actor can do
IntentWhat an actor plans or seeks
LeverageWhat an actor uses to influence others
Confidence — computed
Derived from source reliability (A–E) and corroboration (number of independent sources on the same event), not judged directly. Most signals in this register are single-sourced and therefore sit at Medium or below.
Timeline entries show Obs (raw event) and Assessment (IPSC analysis) separately.
Citation & Licence
Cite as
Indo-Pacific Studies Center. Indo-Pacific Chokepoints, Indo-Pacific Strategic Dynamics, August 2026 Edition, Strategic Brief Issue 001. Indo-Pacific Studies Center, 29 August 2026.
Plain text
Indo-Pacific Studies Center. "Indo-Pacific Chokepoints," Indo-Pacific Strategic Dynamics, August 2026 Edition, Strategic Brief Issue 001. Indo-Pacific Studies Center, 29 August 2026.
Basis
65 signals across 3 subdomains of MaritimeContestation, contributed by
5 research centres.
Contributing centres
RC03 Philippines (8) · RC04 Japan (4) · RC05 Cross-Strait (5) · RC06 IndoPacific Security (2) · RC07 Maritime Corridors (46). Centre attribution for each signal appears in the
annex register.
Copyright
© 2026 Indo-Pacific Studies Center (www.indo-pacificstudiescenter.org). Licensed under CC BY-NC-ND 4.0 — attribution required; no commercial use; no derivatives. This brief is produced for analytical and informational purposes and does not constitute official policy advice.
Annex — Assessed Evidence
1 Jul 2026
RC07
S65 MPA Singapore NtM Ed. 7/2026 – Sunken Vessel and Batu Berhanti Buoy Removal
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsMPA Singapore Notices to Mariners Edition 7/2026 (issued 1 Jul 2026) notifies all vessels: (1) Batu Berhanti Fl(2)5s buoy removed for maintenance — navigate with caution in vicinity; (2) sunken vessel at 01-12.852N 103-55.408E — keep at least 500 metres clear; (3) obstructions in TSS lane between Buffalo Rock and Batu Berhanti — proceed at safe speed with extreme caution and continuous position fixing. Vessels navigating SOMS must maintain UKC of at least 3.5m and proceed no faster than 12 kts in the westbound Singapore Strait lane.
AssessmentThe simultaneous removal of the Batu Berhanti isolated danger mark and the presence of an uncleared wreck in the same TSS corridor between Buffalo Rock and Batu Berhanti creates a compounded navigational hazard in one of the world's busiest traffic lanes during July 2026. The hazard is particularly significant for deep-draft tankers re-routing from Hormuz and transiting in higher numbers. MPA August NtM confirms the wreck warning persisted into the subsequent reporting period.
1 Jul 2026
RC07
S64 VLCC Freight Market Confirms Lombok Re-routing Surge — TD3C and Bab el-Mandeb Dynamics in July 2026
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
China
ObsVantage Shipbrokers July 2026 VLCC Report documented that TD3C (the benchmark Middle East Gulf to China VLCC rate) softened 9.3% month-on-month for July overall but masked rates climbing steadily through July after the US-Iran MOU collapsed. Houthi pressure on Bab el-Mandeb pushed VLCC Yanbu-Ulsan freight (via Cape of Good Hope) toward W300. Saudi crude flows were redirected via SUMED pipeline/Sidi Kerir tightening Atlantic prompt tonnage. This routing restructuring placed greater emphasis on Indonesian straits alternatives — principally Lombok — as the deep-water pathway for laden VLCCs unable to use Malacca at full draft. Market signals in July confirmed Lombok's elevated role as primary deep-draft alternative.
AssessmentThe July VLCC rate data corroborates the structural routing shift toward Lombok identified in intelligence reporting. The combination of Hormuz closure and Bab el-Mandeb pressure has effectively elevated Lombok from a secondary routing option to a primary artery for deep-draft crude. This increases the commercial case for Indonesian corridor management but also elevates the strategic value of the passage to any actor seeking to influence or monitor Gulf crude flows to China.
2 Jul 2026
RC07
S62 CCG Record Patrol Density at Scarborough Shoal
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsAMTI analysis of AIS data (Jan-Jun 2026) shows CCG accumulated 933 ship-days at Scarborough in H1 2026 — nearly matching 2025's full-year total of 1099 ship-days — with monthly average rising from 90 to 156 ship-days. Multiple CCG vessels coordinated a ~30 NM perimeter patrol; 6-8 maritime militia vessels maintained near-continuous inner presence. 112 documented CCG-PCG encounters recorded in H1 2026. AMTI notes this is the highest CCG activity since AIS tracking began in 2019.
AssessmentThe structural shift in CCG patrol density at Scarborough — approaching full-year 2025 levels in just six months — indicates a deliberate strategy to consolidate de facto control before any Code of Conduct deadline. The embedded militia detachment inside the perimeter functions as a persistent access-denial layer below kinetic threshold. Trajectory is strongly escalatory with acceleration.
2 Jul 2026
RC07
S63 Maritime Militia Near-Continuous Deployment at Scarborough as Area Denial Instrument
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsAMTI AIS analysis (Jan-Jun 2026) documented a persistent detachment of 6-8 Chinese maritime militia vessels maintaining near-continuous presence at Scarborough Shoal inside the CCG's ~30 NM outer perimeter. Some CCG ships patrolled along and at times beyond China's nine-dash line to intercept Philippine vessels before they reached the shoal. The AMTI report noted that CCG activity at Scarborough in 2026 is 'beyond any previously observed CCG activity in the South China Sea since AMTI began regular AIS tracking in 2019.' This militia layer is concurrent with the record CCG patrol density reported in the same report (publication date 2 Jul 2026 used as event date proxy).
AssessmentThe layered CCG outer perimeter plus militia inner cordon constitutes a standing access-denial architecture at Scarborough that operates below kinetic threshold year-round. The militia's near-continuous presence (vs episodic deployment) signals a shift from reactive to persistent area control. Correlation with the removal of the floating research structure on 17 Jun suggests Beijing is substituting alternative control instruments to avoid triggering redlines on fixed structures. (Using publication date as proxy)
2 Jul 2026
RC07
S61 PT PAL Scorpene Evolved Submarine Construction — Indonesian Undersea ALKI III Deterrent
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
ObsOn 2 July 2026 PT PAL Indonesia announced it was bringing forward the first steel-cutting milestone for Indonesia's lead Scorpène Evolved submarine from September 2026 to July 2026. Janes confirmed the announcement following completion of the programme qualification phase. The contract covers two Scorpène Evolved Full LiB submarines with six 533 mm torpedo tubes capable of launching heavyweight torpedoes and anti-ship missiles. Naval Group SRI Programme Director Vincent Vimont stated first steel cutting would occur in July 2026 with sea trials 2030–2032 and delivery in 2032. The announcement marked Indonesia's transition from procurement dependency to indigenous submarine manufacturing — the first ASEAN state to build advanced conventional submarines domestically under full technology transfer.
AssessmentThis is the most significant long-cycle ALKI III capability signal of the period. Indigenously constructed Scorpène-class submarines with anti-ship missile capability will — upon delivery in 2032 — provide TNI-AL its first credible undersea deterrent within ALKI III. The programme directly addresses Indonesia's identified vulnerability to foreign submarine penetration of the ALKI corridor system and provides future submerged enforcement capability. The accelerated timeline (brought forward two months ahead of schedule) signals executive-level priority. Analyst notes this is a first-occurrence event: Indonesia has never before domestically constructed an advanced submarine.
4 Jul 2026
RC05
S60 Record PLAN/CCG Maritime Mobilisation First Island Chain
MaritimeContestation.CoastGuardAndMilitiaOperations
China → Taiwan
ObsTaiwan's NSC Secretary-General Joseph Wu stated on 4 July that over 110 PLAN and CCG vessels had been tracked along the First Island Chain marking a historic high. NSB Director-General Tsai Ming-yen confirmed on 6 July that the July–September period is China's peak annual exercise season and stated the NSB was monitoring whether new operational patterns had emerged. A China-Russia Maritime Joint Exercise 2026 also commenced in the Yellow Sea concurrently.
AssessmentConcurrent CCG normalisation east of Taiwan combined with a record surface vessel count along the First Island Chain and simultaneous China-Russia naval exercises presents a compounding pressure picture. Even if the vessel surge partly reflects typhoon-avoidance port-clearance the overall posture coincides with new CCG patrol architecture east of the island and signals a deliberate escalation of tempo into peak exercise season.
5 Jul 2026
RC07
S59 Armed Robbery at Sea – Tanker in Transit
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsReCAAP ISC weekly report (7–14 Jul) confirms a CAT 4 armed robbery against a tanker transiting the Malacca Strait to Singapore on 5 Jul 2026; ship property and stores stolen; crew uninjured. Incident brings total SOMS incidents to 22 since January 2026. ReCAAP ISC advised intensified vigilance and immediate reporting to law enforcement agencies.
AssessmentThis is the first July in-transit AR incident reported in the Malacca Strait proper (as opposed to the Singapore Strait eastbound TSS lane) in 2026 and marks a geographic shift in the attack pattern. With 22 cumulative SOMS incidents by mid-July the pace remains elevated relative to H1 2025 baselines even though the half-year aggregate declined 64%. Continued monitoring of whether perpetrators replicate the in-transit vector is warranted.
6 Jul 2026
RC04
S58 JASDF Scramble — Chinese Aircraft East China Sea (SLBM Day)
MaritimeContestation.CoastGuardAndMilitiaOperations
EastChinaSea
China → Japan
ObsIn the afternoon of 6 July 2026, JASDF detected and scrambled fighter jets to monitor Chinese aircraft activity over the East China Sea. Japan's Joint Staff Office issued an event summary on 8 July 2026 confirming the scramble. No further details on aircraft type or airspace breach were disclosed. The scramble coincided with the PLAN SLBM test conducted the same day and the commencement of Joint Sea-2026.
AssessmentChinese aerial activity over the East China Sea on the same day as the SLBM test and the start of Joint Sea-2026 suggests a coordinated multi-domain pressure package. Japan's routine scramble response indicates the ADIZ monitoring posture remains calibrated and controlled, consistent with an intent to avoid escalation while maintaining presence.
6 Jul 2026
RC07
S56 PLAN SSBN Pacific SLBM Test — ALKI III Strategic Corridor Implication
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
China → Australia
ObsOn 6 July 2026 a PLAN Type 094 (Jin-class) SSBN fired an SLBM with a dummy warhead from the South China Sea toward the Western Pacific in China's first publicly acknowledged full-range strategic SLBM test into international waters. Taiwan tracked the trajectory as consistent with a JL-2 or JL-3 launched from the South China Sea; the warhead impacted approximately 300 km east of Tonga after a 7200–7300 km flight. CSIS analysis noted navigational warnings suggested two possible launch areas including a South China Sea origin. The test directly elevates the strategic significance of ALKI III as the primary deep-water Pacific-Indian Ocean egress corridor for any SSBN seeking to transit from the South China Sea/Western Pacific into the Indian Ocean basin, since Ombai-Wetar at 3250 m depth is one of the only viable submerged transit routes available southward.
AssessmentThis is the highest-impact ALKI III-adjacent event of the reporting period. The SCS-origin SSBN launch trajectory and China's confirmed interest in sustaining SSBN patrols from protected maritime bastions in the SCS/Bohai directly increases strategic demand for covert submerged access through ALKI III. Any future SSBN breakout from the SCS toward Indian Ocean deterrent patrol areas would most plausibly route via Ombai-Wetar given its 3250 m depth. The test raises the probability that PLAN SSBNs are conducting or planning transit reconnaissance through ALKI III-proximate waters. TNI-AL detection and response capability gaps remain a key vulnerability.
6 Jul 2026
RC07
S57 CCG East Taiwan — Continuous Presence Intent Assessment
MaritimeContestation.ChokepointControlAndTransit
TaiwanStrait
China → Taiwan
ObsCMSI Note 21 'The New Normal East of Taiwan' (Martinson 6 Jul 2026) documents that on 4 July two CCG cutters relieved the original task force that had maintained continuous presence east of Taiwan since early June — the first documented relief-in-place east of Taiwan. CMSI assesses the rotation indicates Beijing intends to normalise CCG presence in these waters and that CCG could be tasked to escort PRC survey/fishing vessels, obstruct foreign survey operations, and enforce administrative control via boarding and inspection of vessels transiting to/from Taiwan.
AssessmentCMSI finds that unlike previous episodic east-Taiwan CCG deployments this sustained rotation structurally advances PRC capability to enforce maritime quarantine conditions and intercept eastward approaches to Taiwan without triggering military confrontation thresholds. Analyst concurs: persistent CCG presence east of Taiwan is the single highest-structural corridor-access change in the window.
6 Jul 2026
RC07
S55 Hormuz Re-closure Tanker Rerouting Pressure onto ALKI I
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
US
ObsOn 6–7 July 2026 attacks on LNG carrier Al Rekayyat and tankers Wedyan and Cyprus Prosperity prompted the US to reimpose oil sanctions on Iran and resume airstrikes, causing the Hormuz ceasefire arrangement to collapse and the strait to once again become effectively closed to routine commercial shipping. IMF PortWatch data for 23 July showed approximately 10 daily transits against a pre-crisis baseline of 88–130. With the strait effectively closed through the remainder of July, tankers and bulk carriers relying on Gulf-to-East-Asia routes faced sustained pressure to reroute via the Indian Ocean and through ALKI I (Sunda Strait/Karimata Strait) rather than Malacca. Sunda Strait baseline traffic is approximately 2,280 ships annually but spikes 100–200% during Malacca-pressure events; a Hormuz closure adds structural demand on top of that baseline shift.
AssessmentThe effective re-closure of the Strait of Hormuz from early July 2026, combined with the concurrent Red Sea disruption, creates compounding pressure on ALKI I as the shortest available Indian Ocean–South China Sea diversion route for mid-draft tankers and bulk carriers. This materially elevates the strategic value of Sunda and Karimata Straits and raises the salience of any Chinese or Indonesian actions that could affect passage conditions. ALKI I transit tempo and BAKAMLA/TNI-AL tasking will likely increase in response to heavier commercial traffic.
7 Jul 2026
RC04
S54 CCG Armed Vessel Entry — Territorial Waters Senkaku / Approach to Zuihou Maru
MaritimeContestation.CoastGuardAndMilitiaOperations
EastChinaSea
China → Japan
ObsTwo CCG vessels equipped with shipborne guns entered Japanese territorial waters around the Senkaku/Diaoyu Islands on 7 July 2026 and approached the Japanese fishing boat Zuihou Maru with two crew members on board — a qualitative escalation beyond standard patrol entry. Japan's 11th Regional Coast Guard HQ (Naha) confirmed both vessels were gun-armed and that two additional armed CCG vessels were present in the contiguous zone. Global Times separately reported Chinese government vessels had been present in the contiguous zone for 235 consecutive days as of that date. Japan issued departure orders; China's CCG claimed it was expelling a Japanese fishing vessel that had intruded into Chinese waters.
AssessmentThe direct approach to a Japanese fishing vessel by armed CCG ships — explicitly rare per Japan Times and Reuters — marks a material qualitative escalation above the baseline patrol tempo. The selection of 7 July (89th anniversary of the Marco Polo Bridge Incident / Lugou Bridge Incident) carries unmistakable political symbolism. This event structurally alters the CCG engagement pattern from presence-assertion to direct civilian vessel interdiction, raising the risk of a kinetic incident and testing Japan's escalation threshold in the fishing-vessel protection domain.
7 Jul 2026
RC07
S53 PLA Aircraft and PLAN Ship Sustained Operations Around Taiwan — Southwestern ADIZ Entries
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → Taiwan
ObsTaiwan MND reported 4 PLA aircraft sorties and 9 PLAN ships operating around Taiwan on 7 July 2026 as of 0600 UTC+8; 3 of 4 sorties crossed the Taiwan Strait median line and entered Taiwan's southwestern ADIZ. The southwestern ADIZ corridor directly overlies the northern Luzon Strait approach and Bashi Channel airspace, putting these incursions within monitoring range of the strait's eastern access. ROC Armed Forces deployed CAP aircraft, Navy vessels, and coastal missile systems in response.
AssessmentRoutine daily activity by PLAN/PLAAF at mid-July tempo is consistent with the pre-2024 baseline pattern documented by ISW-CDOT. However, 9 PLAN ships operating concurrently represents elevated naval density and is analytically linked to the ongoing SSBN test posture and post-Joint-Sea-2026 patrol activity. Southwestern ADIZ incursions reinforce PLAN presence at the northern mouth of the Luzon Strait. Assessed MEDIUM confidence; date is official ROC MND release.
7 Jul 2026
RC07
S52 India–Indonesia Sabang Port Development Agreement – Western Malacca Approach
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
India → China
ObsPM Modi visited Jakarta 6–8 Jul 2026; India and Indonesia agreed to jointly develop Sabang Port on Weh Island off northern Sumatra. The joint statement welcomed India's interest in integrated development of Sabang covering shipbuilding ship-repair shore-based energy services and maritime connectivity. Prabowo stated both ports (Sabang and Andaman–Nicobar) would serve as a strategic maritime link. Indonesia agreed to procure BrahMos and Astra missiles. Sabang overlooks the northern entrance to the Strait of Malacca approximately 160 km from India's Great Nicobar project.
AssessmentThe Sabang agreement creates a bilateral India–Indonesia maritime arc flanking the northern approach to the Malacca Strait — a geometry directly relevant to chokepoint access risk. Combined with the US–Indonesia Major Defence Cooperation Partnership (April 2026) this marks a structural deepening of non-littoral partner presence near the strait's western entrance. China is likely to treat this as a counter to its Malacca Dilemma strategy. Sabang's strategic salience is heightened by the 2026 Hormuz closure which has elevated Malacca to principal energy transit corridor.
7 Jul 2026
RC07
S50 Hormuz Breakdown Revives Malacca Toll-Regime Debate – Chokepoint Risk Repricing
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsCNBC analysis published 7 Jul 2026 reports that Iran's push to control and toll Hormuz transit has prompted energy market participants to worry about analogous toll introduction on the Malacca Strait. CSIS analysts stated: 'Iran's efforts to control and toll traffic through the Strait of Hormuz have renewed fears that states could try to do the same to the Malacca Strait.' On 28 Jul 2026 Oman tabled a Gulf-backed '50-50 co-management plus voluntary transit fees' plan for Hormuz explicitly described as modelled on the Strait of Malacca governance framework. Kpler data indicates Hormuz transit at approximately 10 vessels per day on 23 Jul versus a baseline of 88–130 per day.
AssessmentThe explicit invocation of the Malacca governance model in Hormuz peace proposals during July 2026 introduces a new legal-political risk vector for the strait: if the Malacca model becomes a template for contested waterway monetisation it could embolden calls for Indonesia or Malaysia to consider transit fee regimes. This is a first-instance signal of exogenous geopolitical pressure reframing the SOMS access governance debate. The littoral states have not yet responded publicly to this framing during the window.
7 Jul 2026
RC07
S49 IOJI Maritime Domain Awareness Report: UUV and AIS Spoofing in Indonesian Waters (incl. ALKI II)
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
ObsIOJI launched its Maritime Domain Awareness Report (covering October 2025 to July 2026) in Jakarta on 7 July 2026 identifying three escalating threat categories in Indonesian waters: AIS spoofing, opaque vessel ownership structures, and unauthorised UUV deployments. The report specifically highlighted the Lombok Strait UUV discovery (CSIC-marked device recovered in April 2026) as evidence of persistent foreign intelligence collection inside ALKI II. Findings were presented publicly alongside Kompas media investigation corroborating suspected spoofing activity near Bintan. Indonesia's Ministry of Defence had previously pledged enhanced monitoring in response to the April UUV incident, but the July report confirms no enforcement action against the operating state had materialised to that date.
AssessmentThe IOJI report's public release in July crystallises Indonesia's documented inability to detect or deter covert undersea intelligence operations within ALKI II. The simultaneous AIS spoofing pattern is consistent with dark-fleet concealment routing now using Lombok as a Malacca bypass. Together these signals indicate ALKI II passage conditions are deteriorating in the transparency dimension at the same time commercial traffic is surging; Indonesia's domain awareness gap is now publicly documented and creates a permissive environment for continued Chinese undersea pre-positioning.
7 Jul 2026
RC07
S51 KRI I Gusti Ngurah Rai Pacific Transit Northbound — ALKI III Egress
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
Russia
ObsTNI-AL flagship frigate KRI I Gusti Ngurah Rai (332) — a Martadinata-class guided-missile frigate — departed Surabaya on 7 July 2026 for Vladivostok to participate in Exercise Orruda 2026 with Russia's Pacific Fleet. USNI News confirmed departure from Surabaya and a 42-day total deployment with expected home arrival 18 August. The transit northbound from Surabaya to Vladivostok routes through the Banda Sea and Maluku Sea — the northern reaches of ALKI III — before transiting the Philippine Sea to the Russian Far East. TNI-AL confirmed dispatching Kopaska (naval special warfare) troops, divers, and a medical team alongside the frigate.
AssessmentThe northbound transit of Indonesia's flagship through ALKI III-proximate Banda and Maluku Sea waters is a routine but analytically relevant movement. The frigate's route demonstrates that TNI-AL's operational flagship uses ALKI III northern corridors as its primary Pacific egress. Simultaneous with Indonesia's absence from RIMPAC as a surface combatant, this deployment signals a temporary reorientation of TNI-AL's principal surface asset away from US-aligned exercise structures toward Russian bilateral engagement. Corridor awareness and monitoring of this route remains operationally important.
8 Jul 2026
RC04
S48 Koizumi Ankara Statement — Japan Formally Internationalises SLBM Concern at NATO
MaritimeContestation.CoastGuardAndMilitiaOperations
EastChinaSea
Japan → NATO
ObsJapan Defence Minister Shinjiro Koizumi held an extraordinary press conference in Ankara on 8 July 2026 on the sidelines of the NATO Ankara Summit and IP4 ministerial meeting. Koizumi stated that China's launch of a ballistic missile the previous day was a 'serious concern for Japan and the international community' and confirmed Japan exchanged views with US Defense Secretary Hegseth and followed up on 'Operation Supercharge'. Japan also confirmed Japan-US commitment to strengthening deterrence in light of the missile launch. Japan publicly linked China's SLBM test to the broader regional security picture at a multilateral forum for the first time.
AssessmentInternationalising the SLBM protest at NATO — coordinated with the IP4 grouping (Japan, Australia, New Zealand, South Korea) — signals Japan is deliberately expanding the diplomatic costs framework for Chinese strategic coercion beyond bilateral channels. The invocation of NATO-IP4 linkage alongside a direct US-Japan deterrence reaffirmation suggests Tokyo is calibrating its response to impose multilateral signalling costs without taking unilateral escalatory action. This is consistent with Japan maintaining a high but not breached threshold.
8 Jul 2026
RC05
S46 OAC Minister Warns CCG Patrols Rewriting Taiwan Strait Status Quo
MaritimeContestation.CoastGuardAndMilitiaOperations
TaiwanStrait
China → Taiwan
ObsAt the 2026 Taiwan International Ocean Forum on 8 July Ocean Affairs Council Minister Kuan Bi-ling warned that China's incremental grey-zone pressure was gradually rewriting the Taiwan Strait status quo without triggering open war. Attended by US Senator Tammy Duckworth and delegates from 15 countries Kuan framed the CCG eastern-Taiwan patrols as part of a single integrated pattern of authoritarian expansionism across Taiwan Japan and the Philippines. NSB Director Tsai Ming-yen said four Chinese naval formations including warships were operating in the Western Pacific the same day noting an upward trend in mobilisation during peak exercise season.
AssessmentKuan's public framing at a multilateral forum is significant as an official Taiwanese effort to internationalise the grey-zone issue and build partner-nation consensus ahead of a potential status-quo shift. The concurrent NSB disclosure of four active formations underscores Taipei's deliberate choice to publicise pressure rather than absorb it quietly. This represents a signalling response to the early-July CCG rotation-in-place event.
8 Jul 2026
RC05
S47 CCG Sustained Patrols East of Taiwan Signal New Permanent Presence
MaritimeContestation.CoastGuardAndMilitiaOperations
China → Taiwan
ObsBy 8 July China signalled its intent to maintain the new CCG patrol east of Taiwan as a permanent feature. CCG spokesman Jiang Lue confirmed the second group of vessels would continue law enforcement patrols after the first group's relief on 4 July. CSIS AMTI Director Gregory Poling stated that by conducting radio verification procedures for passing commercial vessels China was effectively rehearsing the mechanisms required for a future blockade or quarantine. Taiwan's CGA deployed escort vessels to shadow the two Chinese ships. Chinese state media linked the patrols to Japan–Philippines EEZ delimitation talks framing them as a lawfare assertion of Chinese coastal-state rights east of Taiwan.
AssessmentThe combination of CCG spokesman public confirmation of continued patrols AMTI director's blockade-rehearsal assessment and Taiwan's shadowing response confirms this as a durable posture change not a temporary coercive episode. Beijing's lawfare framing — asserting Chinese coastal-state rights in waters it does not legally possess — mirrors the Scarborough Shoal and South China Sea salami-slicing pattern. Impact rated High given the first-time normalisation of CCG presence on Taiwan's Pacific flank.
8 Jul 2026
RC07
S45 CCG Kinmen Formation Incursions — Four Occurrences July
MaritimeContestation.ChokepointControlAndTransit
TaiwanStrait
China → Taiwan
ObsCCG four-ship formations conducted incursions into Kinmen's restricted waters on four separate occasions in July: 8 July 14 July 21 July and 29 July. This maintains the once-weekly cadence established since February 2024. AEI/ISW notes the July total was less than half the peak incursion counts for July 2025 and July 2024 indicating a slight tempo reduction relative to prior-year peaks though the four-times-monthly pattern itself remains stable.
AssessmentThe four-per-month pattern at Kinmen continues to assert PRC law-enforcement jurisdiction over Taiwan-administered waters without triggering a new escalation threshold. The slight volume reduction relative to prior July peaks is consistent with the ISW/AEI assessment of a deliberate PRC shift from volume-based air and sea coercion to persistent structural presence — corridor relevance is sustained.
9 Jul 2026
RC07
S44 Chinese Academic Sovereignty Claim Over Batanes Islands — Lawfare Against Bashi Channel Denial Posture
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → Philippines
ObsOn 9 July 2026 China's Global Times reported on a Jinan University symposium held 30 June at which scholars from Nanjing University and the Chinese Academy of Social Sciences unanimously concluded that the Batanes Islands are a natural geographic extension of Taiwan and thus Chinese sovereign territory. Scholars also asserted the Japan-Philippines maritime delimitation talks violate international law and called for China to take 'corresponding actions.' The Philippines DFA rejected the claim as settled and not up for debate; Defense Secretary Teodoro called it 'baseless and ludicrous' and a signal of Beijing's intent to dominate the Pacific. Stanford's SeaLight project linked the claim to recent PLAN patrols through the Bashi Channel. Beijing's Foreign Ministry declined to endorse or repudiate the claim.
AssessmentThis represents a coordinated lawfare signal rather than a formal territorial claim. The targeting of Batanes — which hosts the Mahatao FOB and is the intended basing site for NMESIS and allied ISR systems — directly challenges the US-Philippine Bashi Channel denial architecture. The pattern mirrors the Ryukyu 'status undetermined' tactic: academic ambiguity allows Beijing to pressure Manila without formal escalation. Timing concurrent with SSBN bastion test and Joint Sea-2026 patrol is analytically significant. Assessed HIGH confidence on the fact of the symposium and Manila's response.
9 Jul 2026
RC07
S43 Hormuz Crisis Re-escalation Drives Structural VLCC Rerouting via Lombok Strait — Ceasefire Collapse July 2026
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
US
ObsThe US-Iran Memorandum of Understanding that had partially reopened the Strait of Hormuz from 17 June broke down in early July 2026 after IRGC attacks on commercial vessels transiting the southern corridor. Lloyd's List Intelligence (21 July 2026 brief) reported that non-Iranian tanker transits collapsed from 108 to 25 in the week of 13-19 July and VLCC movements declined to just 9 weekly transits. Windward Maritime AI had documented Iran-linked routing increasingly shifting toward Lombok and Sunda to avoid Malacca visibility. The ceasefire collapse on or around 9 July (as per Windward timeline and carraglobe.com citing IMF PortWatch data of 23 July showing ~10 vessels/day against pre-crisis baseline of 88-130) compounded an already structural rerouting trend that had been building since February 2026.
AssessmentThe re-collapse of the Hormuz MOU in early July structurally elevated Lombok's role as the primary dark-fleet alternative routing option for Iranian-linked crude bound for China and India. The corridor is now simultaneously under Chinese undersea ISR pressure (UUV pattern) and experiencing a surge in low-visibility tanker traffic with AIS manipulation. This dual-use escalation — military-ISR and sanctioned commercial — in the same waterway during the same period represents a significant change in ALKI II passage conditions that raises corridor-management demands on TNI-AL and BAKAMLA substantially above peacetime norms.
12 Jul 2026
RC03
S42 China Formal Rejection of 2016 Arbitral Award on 10th Anniversary
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsOn 12 July 2026, the 10th anniversary of the 2016 arbitral ruling, China's MFA issued a formal statement declaring the award 'null, void and without binding force,' asserting internal waters and historic rights over all South China Sea Islands including Nansha Qundao, and rejecting compulsory UNCLOS dispute settlement under its 2006 Article 298 declaration. The statement was a direct response to a 14-nation joint statement (US, Philippines, Australia, Canada, Germany, Japan, UK et al.) reaffirming the award's binding legal force.
AssessmentChina's re-articulation of internal waters and historic rights claims on the award's 10th anniversary, in response to a 14-nation coalition statement, signals Beijing's intent to harden its legal counter-narrative as a prerequisite to sustained operational coercion. The explicit invocation of internal-waters status for the Nansha Islands strengthens the legal architecture used to justify CCG interdictions.
12 Jul 2026
RC07
S41 Indonesia ASEAN South China Sea Code of Conduct — 10th Anniversary Arbitration Milestone and ALKI Sovereignty Implications
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
China → Philippines
ObsJuly 2026 marked the 10th anniversary of the arbitral ruling in favour of the Philippines in its South China Sea case against China. The ASEAN Leaders' Declaration on Maritime Cooperation adopted at the 48th Summit in Cebu on 8 May 2026 referenced UNCLOS no fewer than 18 times, yet ASEAN had still not officially recognised the 2016 South China Sea Arbitral Award. The Philippines-chaired 2026 ASEAN summit had set a target of concluding the Code of Conduct by July 2026; The Diplomat reported on 12 July 2026 that this deadline was unlikely to be met, with China continuing to resist a binding instrument and ASEAN remaining divided. Indonesia under Prabowo held a pivotal but ambiguous role, having acknowledged overlapping claims with China in November 2024 while simultaneously supporting UNCLOS in multilateral forums.
AssessmentThe failure to meet the 2026 CoC deadline leaves the legal framework governing ALKI I approach waters unresolved. Indonesia's internally inconsistent posture — supporting UNCLOS publicly while acknowledging overlapping claims bilaterally with China — weakens its leverage in asserting ALKI notification compliance. Without a binding CoC, China faces no multilateral constraint on CCG activity in ALKI I approach waters. The anniversary milestone may prompt symbolic Indonesian reassertions of UNCLOS primacy but is unlikely to alter operational patterns in July 2026.
13 Jul 2026
RC03
S40 Chinese Vessel Concentration in Philippine EEZ
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsAFP monitoring for the week of 7–13 July 2026 recorded 24 Chinese vessels in key WPS areas: 21 CCG and 3 PLAN vessels. Bajo de Masinloc (Scarborough) held the highest concentration with 13 CCG ships; Ayungin (Second Thomas) Shoal had 4; Escoda Shoal 3; and the Pag-asa Islands area 4. The simultaneous PLAN and CCG presence reflects coordinated grey-zone layering across multiple features.
AssessmentConcurrent CCG and PLAN deployment across four separate Philippine-claimed features in a single reporting week demonstrates China's capacity for simultaneous multi-domain pressure. The inclusion of three PLAN warships alongside CCG units elevates the coercive backdrop and narrows Philippine manoeuvre space should any single incident escalate.
14 Jul 2026
RC03
S39 Philippines DOJ Dedicated Maritime Law Unit Established
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
Philippines → China
ObsThe Philippine Department of Justice announced the creation of a dedicated maritime law unit to serve as a single institutional repository for legal expertise on the 2016 Arbitral Award and UNCLOS, announced by Justice Secretary Fredderick Vida on or around 14 July 2026. The AFP issued a formal statement of support, framing the unit as 'critical legal armor' complementing the physical maritime presence of the PCG and BFAR. The unit's mandate explicitly encompasses sustaining the Philippines' arbitral gains. (using publication date as proxy)
AssessmentThe DOJ unit institutionalises the Philippines' legal-track strategy, creating a whole-of-government architecture to counter Chinese diplomatic and legal revisionism. Paired with the ASEAN Maritime Centre and ASEAN Coast Guard Forum framework finalised in 2026, it signals Manila is building durable institutional structures — not just reactive diplomatic responses — around the arbitral award.
14 Jul 2026
RC07
S37 ReCAAP H1 2026 Half-Year Report – SOMS Incident Trend
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsReCAAP ISC Half-Year Report released 14 Jul 2026 records 35 armed robbery incidents across Asia Jan–Jun 2026 – a 64% decrease vs 96 incidents in H1 2025 and the lowest H1 tally since 2019. SOMS specifically fell 74% to 21 incidents (from 80 in H1 2025). 20 of 21 SOMS incidents occurred in the eastbound TSS lane of the Singapore Strait. Bulk carriers accounted for 62% of targeted vessel types; approximately 75% of incidents occurred at night. ReCAAP attributes the improvement to effective preventive measures and firm enforcement by littoral states.
AssessmentThe dramatic H1 2026 improvement in SOMS reflects the deterrent effect of 2025 Indonesian police arrests. However the cumulative 2026 YTD figure of 22 by 15 July suggests July alone may account for roughly one additional incident versus the full-month average needed to sustain the downward trend. The geographic concentration in the eastbound TSS lane remains a structural vulnerability and the in-transit Malacca Strait attack on 5 Jul signals a possible vector expansion.
14 Jul 2026
RC07
S38 CCG Continued Presence in North Natuna Sea / ALKI I Approach Waters — July 2026 Pattern
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
China
ObsThe KBA13 Southeast Asia Strategic Intelligence Update published 14 July 2026 assessed that Chinese fishing fleets and coast guard vessels had become more active in the Natuna area under Prabowo's presidency, and that the operational reality of Indonesian responses was converging toward the more assertive Philippine posture despite different diplomatic framing. The 9dashline analysis from March 2026 confirmed that since late 2024 Chinese maritime activities — including CCG incursions beginning barely a day after Prabowo's inauguration — had tested Indonesia's ambiguity strategy and prompted the coast guard to expel Chinese vessels on several occasions. The RSIS paper from the same period noted that implicit acceptance in the November 2024 joint statement could further legitimise CCG operations in contested waters, increasing operational tempo.
AssessmentThe recurrent CCG presence pattern in the North Natuna Sea — which is simultaneously the northern entry of ALKI I — represents an ongoing structural challenge to Indonesia's ALKI management authority. CCG vessels in the approach corridor complicate transit notification compliance assessment for all foreign vessels: a Chinese vessel transiting undeclared may claim ALKI passage rights while simultaneously asserting Chinese jurisdiction over the same waters. The Prabowo administration's acknowledged policy ambiguity on the nine-dash line after the November 2024 joint statement could reduce Indonesia's diplomatic leverage in contesting undeclared PLAN or CCG ALKI transits.
15 Jul 2026
RC06
S36 Malaysia-Indonesia Malindo Patkor Siri I 2026 Joint Air Patrol over Strait of Malacca
MaritimeContestation.ChokepointControlAndTransit
Regionwide
ObsMalaysia and Indonesia conducted the Malindo Coordinated Patrol (Patkor) Siri I 2026 on 15 July 2026 — the first joint air patrol of the year over the Strait of Malacca. The RMAF deployed three F/A-18D Hornets from No. 18 Squadron Kuantan Air Base; TNI-AU deployed two F-16C fighters from Air Squadron 16 at Roesmin Nurjadin Air Base Pekanbaru. The patrol aimed at strengthening surveillance and operational readiness and served as a bilateral show of presence over the critical chokepoint. CRC Kuantan functioned as operations control centre.
AssessmentThe timing of the first Malacca Patkor patrol of 2026 is significant in the context of heightened Hormuz disruption diverting additional traffic to Malacca and Indonesia's now-withdrawn transit fee proposal. The joint aerial patrol demonstrates that the two largest littoral states are maintaining coordinated presence over the world's most trafficked chokepoint corridor despite the regional political sensitivity around the fee proposal. The patrol reinforces chokepoint resilience by demonstrating functional bilateral cooperation and deters unilateral coercive action.
15 Jul 2026
RC07
S35 Port Klang Congestion Surge – Yard Density 90–95% and Vessel Delays 2–3 Days
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsKuehne+Nagel port operational update for 15–21 Jul 2026 reports Port Klang 7-day average vessel waiting time at 1.63 days; yard density increased to 90–95%; heavy berth congestion causing average vessel delays of 2–3 days; additional vessel bunching by multiple carriers expected; planned maintenance dredging postponed to 3–12 August to help alleviate congestion. Week 7–14 Jul update showed yard density at 80–85% with 1-day delays and noted planned dredging of berths B23–B24 from 23 Jul to 1 Aug would close approximately 600 metres of berth space impacting mega-vessel berthing.
AssessmentPort Klang congestion spiked materially during mid-July 2026 reaching a yard density of 90–95% — a level that typically triggers cargo rollings and schedule deterioration. The timing coincides with Hormuz-diverted cargo re-routing through Malacca and vessel bunching from global carrier schedule realignment. With 2026 annual throughput targeted at 15.37m TEU and the Hormuz closure redirecting energy and container flows into the strait the Port Klang access pipeline is approaching a structural capacity ceiling that represents a chokepoint-within-a-chokepoint risk.
16 Jul 2026
RC07
S32 Malindo Patkor Aerial Series 1/26 – First Joint Air Patrol of 2026 over Malacca Strait
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsMalindo Coordinated Patrol (Patkor) Series 1/26 conducted 16 Jul 2026 — the first joint aerial patrol between Malaysia and Indonesia in 2026. Three RMAF F/A-18D Hornets from No. 18 Squadron Kuantan operated alongside two TNI-AU F-16Cs from Air Squadron 16 Pekanbaru. RMAF stated the operation aimed to enhance coordinated monitoring of the shared maritime boundary and serve as a show of presence demonstrating commitment to peace sovereignty and the integrity of airspace over the Strait of Malacca.
AssessmentThe timing of Patkor Series 1/26 — conducted mid-July against a backdrop of Hormuz closure and heightened great-power competition — signals that Malaysia and Indonesia are actively elevating aerial domain awareness over the Strait. The first-of-year designation indicates a resumption of the scheduled cycle; its execution in week three of July provides a deterrence signal to both grey-zone actors and external powers with growing interest in Malacca corridor access.
16 Jul 2026
RC07
S33 Australia 2026 NDS/IIP Undersea Warfare Investment Directly Responsive to Chinese UUV Activity in Lombok ALKI II
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
China → Australia
ObsThe Australian Department of Defence's 2026 Integrated Investment Program (released April 2026 but formally indexed in July 2026 capability planning cycles) is understood to include AUD $94-130 billion for undersea warfare over the decade 2026-36 including $5-7 billion for uncrewed maritime systems and undersea warfare specifically. ABC News (17 April 2026) and Diplomatist (April 2026) reported the IIP's undersea warfare emphasis was explicitly aimed at monitoring Chinese activities in the Indo-Pacific and the ADF's 2026 NDS identifies Australia's sea lines of communication — including through Indonesian straits — as defining national security. ASPI senior analyst Malcolm Davis was quoted linking the Chinese Lombok UUV directly to submarine tracking of future Australian SSNs through the strait. (Using publication date as proxy for July 2026 capability-planning cycle activity.)
AssessmentAustralia's AUD $130 billion undersea warfare commitment represents the most significant structural response signal to Chinese ISR activity in ALKI II. The explicit linkage by Defence officials and think-tank analysts between the Lombok UUV and the AUKUS submarine corridor requirement establishes ALKI II as the primary strategic geography for future Australian submarine transit. The IIP confirms Canberra has accepted that the corridor is contested and is investing accordingly — but the capability gap is a decade away from closure.
16 Jul 2026
RC07
S34 PRC MSA Vessel Transits Kinmen Prohibited Waters
MaritimeContestation.ChokepointControlAndTransit
TaiwanStrait
China → Taiwan
ObsOn 16 July Taiwan's Coast Guard Administration noted it attempted to drive away a PRC Maritime Safety Administration vessel that transited Taiwanese restricted and prohibited waters around Kinmen without authorisation. AEI/ISW notes ship-tracking data from Starboard Maritime Intelligence confirms MSA ships occasionally pass through Taiwanese Kinmen waters without respect for maritime boundaries but that the MSA has rarely directly participated in grey-zone harassment. This marks an unusual actor-type for the Kinmen incursion pattern.
AssessmentMSA participation in Kinmen restricted-water transits — distinct from the CCG formation incursions — introduces a new instrument and agency into PRC maritime pressure. MSA vessels carry civilian status under SOLAS and their use complicates Taiwan's response calculus. Signals a possible expansion of the multi-agency layering approach used by Beijing to assert jurisdiction around Kinmen.
17 Jul 2026
RC05
S31 Lanhai 201 Fisheries Research Vessel Surveys Taiwan Eastern EEZ
MaritimeContestation.CoastGuardAndMilitiaOperations
TaiwanStrait
Taiwan → China
ObsFrom 17–23 July Chinese fisheries research vessel Lanhai 201 operated by the East China Sea Fisheries Research Institute under the Chinese Academy of Fishery Sciences conducted a weeklong survey in Taiwan's EEZ. The vessel was tracked 53 nautical miles east-northeast of Orchid Island (Lanyu) off Taitung County and operated in the EEZs of Taiwan Japan and the Philippines. China's Ministry of Agriculture and Rural Affairs publicly announced the survey as legitimate fisheries management. Taiwan's CGA condemned it as violating sovereignty stating the survey required coastal state consent under UNCLOS. This was the second such research vessel incursion since June. A CCG escort vessel (2305) was observed with the Lanhai 201. CMSI Note 22 assessed the mission as supporting Beijing's broader effort to assert sovereignty ambiguity over the Ryukyu Islands and Batanes.
AssessmentThe deployment of a state-owned fisheries research vessel into Taiwan's EEZ — escorted by CCG and trumpeted in state media — is a deliberate civilian-instrument sovereignty assertion. The CCG escort converts a nominally scientific mission into a law-enforcement-backed incursion. Operating across three EEZs in one cruise integrates the Taiwan the Japan and the Philippines pressure theatres into a single operation consistent with Kuan Bi-ling's first-island-chain framing. Rated High as the second such intrusion in six weeks marks a new operational tempo.
17 Jul 2026
RC07
S30 PLA ADIZ Operations Elevated Sortie Spike July 17
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → Taiwan
ObsROC MND / GlobalSecurity reported that on 17 July 2026 a total of 9 sorties of PLA aircraft and 7 PLAN ships were detected operating around Taiwan; 6 of the 9 sorties crossed the median line of the Taiwan Strait and entered Taiwan's northern and adjacent ADIZ sectors. This represents an elevated single-day sortie and crossing rate within the broader context of 190 total July incursions.
AssessmentThe 17 July activity — with two-thirds of detected sorties crossing the median line — constitutes a temporary intra-month surge above the prevailing reduced-tempo baseline and may reflect targeted political signalling or training ahead of the 24 July declared combat readiness patrol. The northern ADIZ vectors are directly above the Luzon Strait approach corridor.
18 Jul 2026
RC07
S28 NAVAREA XI Warning 26-0324 — Hazardous Operations Zone North of Luzon in Luzon Strait Approach
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
ObsNAVAREA XI Warning 26-0324 was issued 18 July 2026 (0000Z) designating two hazardous operations / space debris re-entry areas in the North Pacific north of Luzon in the Luzon Strait approach corridor. Zone A was bounded by 21°50'N 123°54'E / 21°51'N 124°17'E / 20°30'N 124°21'E / 20°29'N 123°58'E; Zone B by 21°16'N 123°55'E / 21°17'N 124°19'E / 19°56'N 124°22'E / 19°55'N 123°59'E. Active window: 0100Z–0700Z 22 July 2026. Message self-cancelled 0800Z 22 July.
AssessmentAlthough issued as a space debris notice, the timing and geographic footprint — spanning both flanks of the northern Luzon Strait at 20°N–21°51'N — overlapped with the USS George Washington CSG's transit of the strait on the same date (22 July). The six-hour restriction created a transient navigational awareness requirement across the primary shipping channel north of Luzon. No military exercise or firing attribution is made in the notice itself; confidence in any operational linkage is Low.
18 Jul 2026
RC03
S29 DND Pledges Sustained Military Asset Deployment in WPS
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
Philippines → China
ObsThe Philippine Department of National Defense stated on 18 July 2026 that it would sustain continuous deployment of military assets in the West Philippine Sea to protect maritime territory and expose illegal activities by foreign vessels. The commitment came one week after the 10th anniversary of the 2016 Arbitral Award and coincided with denunciation by the National Maritime Council of a China Daily racist propaganda video targeting Filipinos.
AssessmentThe DND statement operationalises the political signalling around the arbitral anniversary, converting declaratory posture into force-deployment commitment. The simultaneous condemnation of Chinese propaganda indicates Manila is managing escalation in both the kinetic and information domains, seeking to maintain domestic and international legitimacy while sustaining its presence.
19 Jul 2026
RC07
S27 PLAN Destroyer CNS Kaifeng Live-Fire Drill in Japan EEZ — Philippine Sea Approach to Luzon Strait
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → Philippines
ObsOn 19 July 2026 PLAN Type 052D destroyer CNS Kaifeng (124) conducted a small-calibre machine-gun live-fire exercise against a sea target 112 miles (180 km) from Japan's Okinotori Island within Japan's claimed EEZ in the Philippine Sea. Kaifeng was operating as part of a PLAN-Russia joint surface action group that also included Type 055 cruiser CNS Anshan (103) and replenishment ship CNS Kekexilihu (903), shadowed by Russian corvette RFS Rezkiy (343). Japan's Joint Staff Office detected the firing and JMSDF P-1 and P-3C MPA were deployed in response. Japan Defense Minister Koizumi protested publicly. China's MFA defended the action as consistent with international law, invoking freedom of navigation principles it typically contests in the South China Sea.
AssessmentThis is the first publicly announced case of a foreign warship conducting a live-fire exercise inside Japan's EEZ in the Philippine Sea, establishing a new precedent. The joint PLAN-Russian surface action group's southward track through the Philippine Sea places it on the northern approach corridor to the Luzon Strait. The Okinotori live-fire can be read as a demonstration of PLAN freedom-of-action across the Philippine Sea — the maritime space through which any US CSG must transit to reach the Luzon Strait from the east. Assessed HIGH confidence; primary source Japan Joint Staff Office.
20 Jul 2026
RC06
S25 China–Philippines Violent Clash at Second Thomas Shoal – US MDT Reaffirmation
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsOn 20 July 2026 a China Coast Guard small boat from vessel CCGV 21560 unlawfully approached the BRP Sierra Madre at Second Thomas Shoal. Philippine Navy RHIBs were dispatched to escort the Chinese vessel away. Chinese personnel struck a Philippine Navy marine in the head with a baton in a physical altercation also involving long poles and oars resulting in the marine's evacuation for treatment. China accused the Philippines of initiating the clash. The US State Department issued a formal condemnation statement calling on China to immediately cease destabilising conduct reaffirming the Mutual Defence Treaty and the 2016 Arbitral Tribunal ruling. The incident broke a period of relative quiet at the feature and occurred ahead of the ASEAN Foreign Ministers' Meeting in Manila.
AssessmentThis is the most serious physical altercation at Second Thomas Shoal since July 2024 and demonstrates China's willingness to use direct physical force against a US treaty ally's military personnel. The immediate US MDT reaffirmation tests the credibility of the US assurance commitment under operational rather than hypothetical conditions. The timing ahead of the ASEAN AMM suggests deliberate coercive signalling by Beijing. The pattern of escalating intensity at both Second Thomas Shoal and Scarborough Shoal in the same week creates compounding pressure on Philippine-US alliance deterrence credibility.
20 Jul 2026
RC07
S23 CCG-PN Physical Confrontation at Second Thomas Shoal — Sailor Injured
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsOn 20 Jul 2026 at ~0915 local time CCG vessel 21560 — which had been stationed inside the shoal for nearly a week — launched an inflatable boat that approached within 20-30 m of BRP Sierra Madre. Philippine Navy deployed two RHIBs in response. Video shows CCG boat ramming a Philippine RHIB; personnel exchanged blows with wooden batons and oars. Two PN personnel were injured; one sustained a serious head injury and was medically evacuated by PCG on 21 Jul. Philippine DND stated Manila was preparing 'measures to meet this aggression.' US Secretary of State Rubio condemned China's 'dangerous and aggressive actions.' Beijing accused Philippines of transgressing the 2024 provisional understanding.
AssessmentMost severe physical confrontation at Second Thomas Shoal since June 2024. The CCG boat's <30 m approach to BRP Sierra Madre itself — as distinct from intercepting a resupply vessel — marks a deliberate escalation in the access-denial envelope. The provisional arrangement, which had suppressed major incidents for ~13 months, is now functionally under strain. US carrier strike group deployment days later confirms Washington read this as a threshold event.
20 Jul 2026
RC07
S22 BRP Sierra Madre Resupply Mission Conducted Under CCG Confrontation Conditions — July 2026
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsThe 20 Jul 2026 confrontation unfolded during a rotation and resupply (RORE) mission to BRP Sierra Madre when CCG vessel 21560 launched a small boat that approached within 20-30 m of the grounded ship. Philippine Navy personnel deployed RHIBs to intercept. The RORE mission was disrupted by the confrontation; two PN personnel were injured and medically evacuated. The provisional understanding reached in July 2024 — under which 13 missions had been conducted without dangerous encounters — was invoked by both sides in mutual blame, with Beijing accusing Manila of violating its terms. Mission completion status was not confirmed by AFP.
AssessmentThis signal records the RORE mission as a corridor-control indicator. The failure to secure safe passage for the Jul 2026 resupply — and the injury of personnel during what was described as a 'routine patrol' associated with the mission — indicates that the 2024 provisional arrangement no longer provides functional de-escalation assurance. The access corridor to BRP Sierra Madre is now effectively contested at physical proximity level, representing a qualitative deterioration in corridor control.
20 Jul 2026
RC05
S26 Taiwan Conducts Interdepartmental Blockade-Resilience Supply Chain Drills
MaritimeContestation.CoastGuardAndMilitiaOperations
TaiwanStrait
Taiwan → China
ObsTaiwan's Ministry of the Interior led first-ever interdepartmental drills in July to practice securing foreign and domestic supply chains and escorting commercial ships through a PRC maritime blockade. Taiwan Coast Guard announced joint plans with the navy to protect Pacific supply routes in a blockade or quasi-war scenario. President Lai had directed the NSC MND CGA and other agencies after June 23 tabletop exercises simulating a PRC maritime quarantine to strengthen maritime and air intelligence expand drone reconnaissance and update energy and critical supplies stockpile plans. Taiwan News reported CGA preparations including tabletop and live operational drills for blockade contingencies.
AssessmentThese are the first-ever whole-of-government interdepartmental blockade-resilience drills announced by Taiwan's Ministry of the Interior — a structural first occurrence that alters trend direction. The direct linkage to CCG eastern-Taiwan operations confirms that Taipei is now treating grey-zone maritime pressure as a credible near-term contingency rather than a distant planning scenario. Rated Medium impact as a defensive/responsive measure with High deterrence signalling value.
20 Jul 2026
RC07
S21 Iran-flagged Tanker Transit and EOPL Dark Fleet STS Operations – July 2026
MaritimeContestation.ChokepointControlAndTransit
SoutheastAsia
ObsUANI July 2026 Iran Tanker Tracker documents: (1) an Iran-flagged tanker visibly transiting the Malacca Strait on 20 Jul 2026 per MarineTraffic AIS; (2) 26 ship-to-ship (STS) transfers at the Malaysian EOPL anchorage during July 2026 of which 12 involved Iranian crude — most discharging vessels were Iran-flagged with cargo transferred to dark fleet vessels for delivery to China; (3) an unusual STS transfer observed 19 Jul off Penang in the Malacca Strait between two Iran-flagged tankers; (4) vessels routinely disabled AIS or spoofed location signals during operations. UANI notes enforcement remains lacking despite Malaysia possessing enhanced legal frameworks.
AssessmentThe EOPL and Penang STS activity in July 2026 represents a significant grey-zone escalation in the Malacca approaches: 26 monthly STS transfers in Malaysian waters is a high-frequency pattern. AIS spoofing by dark fleet tankers directly undermines TSS integrity and navigational safety in an already congested chokepoint. The Hormuz closure since February 2026 has re-routed Iranian crude flows through Malacca increasing pressure on the strait's grey-zone management capacity. Malaysia's failure to enforce against released tankers is a legal-political signal of a permissive enforcement posture.
20 Jul 2026
RC07
S24 IOJI MDA Report Confirms Persistent Chinese UUV Pattern Across ALKI II Corridor — Three Devices April 2026
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
China
ObsIndo-Pacific 5x5 (Issue 377, 20 July 2026) reported analytical findings from the ASPI Strategist and IOJI confirming a tri-device Chinese UUV deployment pattern across the full ALKI II corridor: (1) 3.7-metre CSIC-marked device north of Gili Trawangan in the Lombok Strait (6 April 2026); (2) elongated blue device near Tanakeke Islands off South Sulawesi between Lombok and Makassar Straits (mid-April 2026); (3) 2-metre yellow torpedo-shaped device off Kangean Island north of Lombok Strait (20 April 2026). All three were located inside or immediately adjacent to ALKI II. The newsletter noted earlier Chinese Sea Wing glider recoveries in 2020 near Masalembu and Selayar Islands along the same corridor. The pattern was described as strategically significant beyond commercial function.
AssessmentThe three-device spatial spread along the entire ALKI II corridor — from Makassar Strait through the Flores Sea to the Lombok Strait — is consistent with a deliberate effort to characterise the full acoustic and oceanographic environment of the passage. This constitutes an active capability-building program for undersea domain awareness that would benefit PLAN submarine transit planning. The July 2026 analytical synthesis elevating this to a pattern rather than an isolated incident is an escalation signal in its own right.
21 Jul 2026
RC04
S19 Japan Diplomatic Protest and Koizumi Farnborough Signal — EEZ Live-Fire
MaritimeContestation.CoastGuardAndMilitiaOperations
EastChinaSea
Japan → China
ObsOn 21 July 2026, Chief Cabinet Secretary Minoru Kihara confirmed Japan had lodged a formal diplomatic protest with China via diplomatic channels over the 19 July live-fire drill, citing danger to navigation of nearby vessels. Defence Minister Koizumi had already disclosed the incident at Farnborough on 20 July and characterised it alongside the joint China-Russia bomber flight and SLBM test as manifestations of 'deepening military cooperation between China and Russia.' China's Foreign Ministry spokesperson Lin Jian called Japan's concerns 'completely unreasonable' and reaffirmed Beijing's position that Okinotori is a rock not entitled to an EEZ.
AssessmentJapan's sequenced disclosure strategy — Koizumi at Farnborough before the formal CCS protest — indicates a deliberate use of international forums to amplify the signal beyond bilateral channels. The muted response (diplomatic protest only; no JSDF operational counter-action) again confirms Japan's calibrated posture: maximum diplomatic signal cost with minimum operational escalation risk. The absence of a stronger response — such as JSDF shadowing in the area — suggests Japan's threshold for kinetic or operational counter-response in the Pacific EEZ domain remains high.
21 Jul 2026
RC07
S18 17th US-Philippines-Japan Multilateral Maritime Cooperative Activity
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
Philippines → Japan
ObsThe 17th Multilateral Maritime Cooperative Activity (MCA) ran 21-25 Jul 2026 in the Philippines' EEZ. AFP confirmed participation of warships, coast guard vessels, surveillance and fighter aircraft from the US and Japan. LCS USS Santa Barbara (LCS-32) participated alongside PCG patrol vessel BRP Malabrigo, JMSDF destroyer JS Yudachi (DD-103) and Philippine frigate BRP Antonio Luna (FFG-15). Drills included communications, replenishment at sea, and division tactics. Exercise launched one day after the 20 Jul baton incident at Second Thomas Shoal. AFP described the activity as highlighting 'the enduring partnership among the partner nations in promoting peace, stability, and security.'
AssessmentTriggering the MCA one day after the Second Thomas Shoal baton incident compresses the standard diplomatic-to-military response timeline and explicitly signals alliance cohesion under provocation. Japan's participation alongside the US adds a third-party deterrence signal that Beijing cannot characterize as a bilateral Philippines-US provocation. The exercise's timing and force mix constitute a deliberate FONOP-adjacent deterrence package.
21 Jul 2026
RC03
S20 Mutual Ambassador Summons – Bilateral Diplomatic Crisis
MaritimeContestation.CoastGuardAndMilitiaOperations
SoutheastAsia
China → Philippines
ObsThe day after the baton assault at Second Thomas Shoal both countries took the highly unusual step of summoning each other's ambassadors simultaneously. President Marcos summoned Chinese Ambassador Jing Quan to Malacañang Palace at 1700 local time; China's MFA urgently summoned Manila's envoy in Beijing to 'lodge solemn representations' over what it called a Philippine 'deliberate provocation and attack at Ren'ai Reef.' The Philippine presidential spokesperson described the matter as one of 'national security.' China's MFA characterised Philippine actions as 'egregious in nature.'
AssessmentMutual simultaneous ambassador summons represents the most severe diplomatic escalation step since the 2023 laser incident. The reciprocity of the summons signals both sides' determination to hold firm rather than de-escalate. Beijing's framing of the Philippine Navy as provocation instigators and 'attackers' is consistent with a counter-narrative strategy aimed at denying international legitimacy to Manila's transparency operations. Marcos's presidential-level summoning elevates this beyond routine DFA protest to a head-of-state signal of resolve.
21 Jul 2026
RC07
S15 Iranian Dark-Fleet VLCCs Routing via Lombok Strait with AIS Manipulation — Structural Pattern Confirmed July 2026
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
ObsLloyd's List Intelligence Hormuz Brief (21 July 2026) confirmed that nearly 70% of observed tanker transits through residual Hormuz corridors in the week of 13-19 July were conducted dark (AIS off), up from 55% the prior week and 42% two weeks earlier. Windward Maritime AI had documented Iranian crude routing structurally shifting toward Lombok Strait to bypass Malacca visibility since May 2026 (two Iranian VLCCs — HUGE IMO 9357183 and DERYA IMO 9569700 — confirmed via UANI satellite imagery transiting Lombok in early May). The July 2026 Hormuz re-closure drove further acceleration of this pattern. AIS disabling has become the norm rather than the exception for sanctioned-cargo vessels using ALKI II.
AssessmentDark-fleet VLCC operations through Lombok with systematic AIS suppression significantly degrade Indonesia's maritime domain awareness and introduce sanctioned-cargo concealment directly into ALKI II. Indonesian authorities lack both the surface patrol density and the undersea detection capability to monitor this traffic effectively. The convergence of dark-fleet tanker surges with Chinese UUV activity in the same corridor during July 2026 creates compounding domain opacity. This pattern also directly complicates Australian partner monitoring of the corridor's southern approaches.
21 Jul 2026
RC07
S17 USNS Henson Survey Vessel in Penghu SW Waters
MaritimeContestation.ChokepointControlAndTransit
TaiwanStrait
US → China
ObsLate on 21 July the US naval survey vessel USNS Henson was reported to have entered waters to the south-west of Qimei Island in the Penghu archipelago during a period of heightened military activity. The positioning coincided with the lead-up to the 22–24 July PRC live-fire notice period. No separate US 7th Fleet transit statement has been identified for this activity within the July window indicating this was not publicised as a formal FON strait transit.
AssessmentUSNS Henson's proximity to the Penghu archipelago during the days immediately preceding PRC live-fire notice issuance is operationally noteworthy. Survey vessels collect oceanographic and acoustic data relevant to anti-submarine warfare and mine warfare — mission profile consistent with corridor-access monitoring. The absence of a 7th Fleet formal transit statement suggests the US is maintaining operational presence through survey vessel movements rather than publicised transit events during this period.
21 Jul 2026
RC07
S16 Indonesia Skips RIMPAC Naval Vessel — Deploys Flagship to Russia (Orruda 2026)
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
Russia → US
ObsJanes confirmed on 21 July 2026 (using TNI-AL statement date) that Indonesia is participating in RIMPAC 2026 without an assigned naval vessel for the first time since 2014 (excluding COVID-affected 2020), while simultaneously deploying KRI I Gusti Ngurah Rai to Vladivostok for Exercise Orruda 2026 with Russia's Pacific Fleet. Indonesia's RIMPAC contribution is limited to a Marine Corps contingent conducting live-fire, fast-rope insertion, and amphibious training. In addition to the frigate, TNI-AL dispatched Kopaska special forces, divers, and a medical team. Indonesia's participation in Orruda was confirmed in an official Navy statement to Janes on 21 July 2026.
AssessmentIndonesia's strategic hedging is most clearly operationalized by this pairing: its principal surface combatant is absent from the US-led RIMPAC while deployed to Russia. For ALKI III, this signals that TNI-AL sovereignty management of the corridor is not tightly coupled to US alliance structures, creating ambiguity over Indonesia's posture toward allied transit coordination frameworks. The first-ever absence of an Indonesian warship from RIMPAC is a trend reversal that warrants tracking. Jakarta's 'free and active' policy is being tested by simultaneous pull from US and Russian bilateral engagement at the operational level.
22 Jul 2026
RC07
S13 USS George Washington CSG Westbound Transit of Luzon Strait — Philippine Sea to South China Sea
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → Philippines
ObsUSS George Washington (CVN-73) and Carrier Strike Group 5 transited the Luzon Strait westbound on 22 July 2026 entering the South China Sea from the Philippine Sea. The CSG comprised CVN-73 with embarked CVW-5 (including F-35C and EA-18G Growler squadrons), cruiser USS Robert Smalls (CG-62) and destroyers USS Benfold (DDG-65) and USS Shoup (DDG-86). The transit was publicly announced by US 7th Fleet under the hashtag #PeaceThroughStrength. US Ambassador to the Philippines Lee Lipton acknowledged the arrival and cited freedom of navigation and overflight. The CSG's repositioning directly followed the most severe Philippine-China physical clash at Second Thomas Shoal to date, in which a Filipino Navy SEAL required medical evacuation.
AssessmentA CSG transit of the Luzon Strait into the South China Sea is a major access-assertion event and a direct demonstration that the US considers the strait open to free transit. The selection of the Luzon Strait route — rather than any alternative — is deliberate given concurrent PLA pressure on the strait corridor. The EA-18G Growler and F-35C flight operations during transit signal electronic warfare and fifth-generation air capability insertion into the South China Sea via this chokepoint. The political timing — 48 hours after the Taiwan Strait live-fire and concurrent with the PHL-US-Japan MCA — reinforces the signal's strategic weight. Assessed HIGH confidence; primary source DVIDS/US Navy official imagery.
22 Jul 2026
RC03
S14 Philippines–China FM Mutual Protest Exchange at ASEAN-AMM Margins
MaritimeContestation.CoastGuardAndMilitiaOperations
SoutheastAsia
China → Philippines
ObsOn the sidelines of the 59th ASEAN Foreign Ministers' Meeting in Manila Philippine Foreign Secretary Lazaro held a bilateral with Chinese FM Wang Yi. Lazaro reiterated a 'strong' protest over CCG 'unacceptable actions against Filipino personnel' and also protested the China Daily racist AI-generated video. Wang Yi lodged a counter-protest over what he called 'the Philippine personnel's egregious act of ramming Chinese law-enforcement vessels' and accused 'certain forces within the Philippine military and police' of deliberately staging provocations under orders from 'external forces.' Both sides agreed to keep communication lines open.
AssessmentThe FM exchange occurring simultaneously with active maritime clashes represents an acute diplomatic-operational disconnect: Chinese grey zone operations intensified even as its top diplomat was physically present in Manila. Wang Yi's accusation of 'external forces' directing Philippine military units is a signal that Beijing intends to widen the narrative conflict to target the US–Philippines alliance, not merely bilateral maritime disputes. Lazaro's decision to also raise the propaganda video contextualises the incidents as part of a multi-domain coercion campaign.
22 Jul 2026
RC07
S12 Philippines–China–US ASEAN FM Bilateral — Wang Yi Bitter Consequences Warning
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsPhilippine Foreign Affairs Secretary Lazaro met Chinese FM Wang Yi bilaterally on the sidelines of the ASEAN Foreign Ministers' Meeting in Pasay City on 22 July 2026. Lazaro lodged a 'strong protest' over CCG 'violent actions' at Ayungin Shoal and demanded removal of remaining structures at Scarborough Shoal. Wang Yi issued a direct warning that the Philippines would 'bear the bitter consequences' if it provoked Beijing with outside backing — an explicit reference to the US alliance. US Secretary of State Rubio attended the same ASEAN meeting and reaffirmed the MDT.
AssessmentWang Yi's 'bitter consequences' threat is Beijing's strongest verbal escalation signal to Manila since 2024; its explicit conditioning on 'outside backing' targets the US–Philippines alliance as the source of Philippine assertiveness and constitutes an attempt to drive a wedge between Manila and Washington at the diplomatic level.
23 Jul 2026
RC07
S9 CCG Vessel Departure from Second Thomas Shoal to Mischief Reef Post-Incident
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsOn 23 Jul 2026 SeaLight reported via Starboard Maritime Intelligence ship-tracking data that CCG vessel 21560 departed Second Thomas Shoal at ~0800 local and headed toward China's military outpost at Mischief Reef. The vessel was the same CCG ship involved in the 20 Jul confrontation that had maintained a position inside the shoal for nearly a week prior to the incident. The departure followed intense international diplomatic pressure and the Philippine medical evacuation of the injured sailor on 21 Jul.
AssessmentThe withdrawal of CCG 21560 may represent a calibrated tactical pullback to reduce escalation optics while the George Washington CSG transited the Luzon Strait. It does not indicate a change in China's overall posture: the vessel's destination (Mischief Reef) maintains PLAN presence in the broader Spratly operational area. Interpret as a tactical pause rather than a strategic de-escalation.
23 Jul 2026
RC07
S10 Philippine DFA Formal Sovereignty Statement on Ayungin RORE Arrangement
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
Philippines → China
ObsOn 23 July 2026 the Philippine Department of Foreign Affairs published a formal statement reaffirming that Ayungin Shoal falls within Philippines EEZ and continental shelf under UNCLOS and the 2016 Arbitral Award. The DFA stated explicitly that the Provisional Understanding does not require Manila to seek Chinese permission for RORE missions nor allow boarding and inspection of Philippine vessels. The statement asserted Philippines-exclusive sovereign right to authorise any structure at the shoal and that Philippine vessels do not require permission to sail to Ayungin.
AssessmentManila's public articulation of the legal boundaries of the Provisional Understanding — denying Chinese claims of notification and inspection rights — signals a deliberate rejection of Beijing's incremental reinterpretation of the 2024 arrangement; this sharpens the divergence between Manila and Beijing's understanding of the arrangement's terms and raises the risk of further physical confrontation as the CCG tests the arrangement's limits.
23 Jul 2026
RC07
S8 PRC Live-Fire Drills Executed — Western Taiwan Strait (23–24 July)
MaritimeContestation.ChokepointControlAndTransit
TaiwanStrait
China → Taiwan
ObsLive-fire exercises ran 0600–1800 local time on 23 and 24 July in two designated zones south of Dongshan Island in the western Taiwan Strait per the Zhangzhou MSA navigation warning. PRC Foreign Ministry spokesperson Lin Jian stated on 23 July that 'relevant Chinese authorities have already released information' on the exercise declining further comment. PRC state media (Global Times) framed the drill as 'routine warning to separatists.' Epoch Times noted the geographic spread included simultaneous Bohai/Yellow Sea and South China Sea military activity areas.
AssessmentBack-to-back live-fire drill days in the western strait represent a direct temporary corridor-access restriction for commercial shipping transiting the Fujian side of the strait. The absence of an exercise name or participating service details was noted by Epoch Times sources as suggesting possible short-notice intensification. The multi-sea-zone simultaneous activity pattern increases aggregate coercion density even if individual zones are limited in geographic extent.
23 Jul 2026
RC07
S11 Hormuz Closure Structural Rerouting — Sunda/Karimata as Primary Malacca Bypass
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
ObsIMF PortWatch data published 23 July 2026 recorded approximately 10 daily Hormuz transits against a pre-crisis baseline of 88–130 per day, confirming the strait remained effectively closed. Analysts at CarraGlobe noted that insurance and routing constraints were the binding factors keeping traffic below normal even after partial reopenings. The EIA identifies Sunda and Lombok as the two principal archipelagic bypasses should Malacca be blocked; Sunda adds approximately 200 nautical miles versus a Malacca route but is accessible to mid-draft vessels. Karimata Strait forms the northern ALKI I segment connecting the South China Sea to the Java Sea and Sunda.
AssessmentThe sustained Hormuz closure through July 2026 is structurally elevating ALKI I's commercial utilisation. A Sunda Strait traffic spike of 100–200% above baseline during Malacca disruption events is historically documented; a concurrent Hormuz closure adds a separate demand driver. This represents a first-of-kind compound disruption scenario for ALKI I transit volumes and increases Indonesian sovereignty management burdens on BAKAMLA and the Directorate General of Sea Transportation.
24 Jul 2026
RC03
S7 CCG Water Cannon Day 2 with Maritime Militia Escort – Scarborough Shoal
MaritimeContestation.CoastGuardAndMilitiaOperations
SouthChinaSea
China → Philippines
ObsSecond consecutive day of CCG water cannon attacks at Scarborough Shoal. At approximately 0626 local time a CCG vessel fired water cannon at BRP Cape San Agustin from approximately 400 metres while the Philippine vessel conducted a patrol about 15 nautical miles northeast of Bajo de Masinloc. The BRP Cape San Agustin was shadowed by at least six CCG ships and several maritime militia vessels. At 0735 a second CCG vessel directed water cannon fire. In total 15 Chinese vessels (CCG and maritime militia) faced 10 Philippine ships including three PCG cutters. A CNN crew aboard a Philippine vessel directly observed a CCG ship come within approximately seven metres of a BFAR vessel creating 'serious risk of collision.' China's MFA stated CCG actions were 'reasonable lawful and beyond reproach.'
AssessmentThree violent incidents in a single week at two separate features (Second Thomas Shoal and Scarborough Shoal) constitutes the highest-tempo grey zone coercion surge of 2026. The 15-vessel Chinese formation – combining CCG with maritime militia in a joint coercive cordon – demonstrates layered area-denial at Scarborough. Close-proximity manoeuvre (7m standoff) in the presence of an international media crew shows Beijing's indifference to transparency deterrence. The conjunction of all three incidents with the ASEAN-AMM strongly suggests deliberate calendar-based coercion signalling.
24 Jul 2026
RC03
S6 CCG 'Control Measures' Statement – Third Incident Scarborough Shoal
MaritimeContestation.CoastGuardAndMilitiaOperations
SouthChinaSea
China → Philippines
ObsChina Coast Guard issued an official statement on 24 July asserting it had taken 'control measures' in accordance with the law against multiple Philippine vessels engaged in 'illegal activities' within China's claimed territorial waters of Huangyan Dao. The statement did not elaborate on specific measures but referenced 'the violent assault on CCG personnel by the Philippines at Ren'ai Jiao on July 20' and warned that 'the Philippines shall bear all consequences arising from its actions.' This was the third CCG incident report issued in the same week.
AssessmentThe explicit cross-referencing of the Second Thomas Shoal baton incident in justification for Scarborough Shoal water cannon operations indicates CCG is constructing a legal narrative linking both features into a single enforcement framework. The 'bear all consequences' language is China's highest-intensity public warning formulation and has historically preceded escalation in tactics. The official Xinhua-via-CCG framing of the incidents as 'law enforcement' not coercion is the standard legal-laundering mechanism that insulates CCG from UNCLOS accountability.
24 Jul 2026
RC07
S5 PLA Declared Joint Combat Readiness Patrol — Multi-Aircraft SW ADIZ Penetration
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → Taiwan
ObsTaiwan's Ministry of National Defence issued a formal press release on 24 July 2026 stating that from 1626 hours a total of 19 sorties of PLA aircraft — comprising J-10 fighters, J-16 multi-role fighters, H-6 strategic bombers, and KJ-500 airborne early warning aircraft — were detected conducting a declared Joint Combat Readiness Patrol. 12 of the 19 sorties penetrated the median line into northern, central, and southwestern ADIZ sectors. ROC Armed Forces monitored and responded with CAP, navy ships, and coastal missile systems.
AssessmentThe formal PLA declaration of a Joint Combat Readiness Patrol on 24 July — the same day CSG-5 was publicly confirmed entering the South China Sea via the Luzon Strait — is unlikely to be coincidental. The multi-type aircraft mix (bombers, fighters, AEW) indicates a rehearsal of an integrated strike and surveillance package. Southwestern penetrations project towards the Luzon Strait northern approach. This event is the month's highest-confidence direct PLA aerial pressure signal against the strait approach corridor.
27 Jul 2026
RC07
S4 NAVAREA XI No. 26-0034 Seismic Survey Persisting in Selat Makassar (S/V Ramform Sovereign)
MaritimeContestation.ChokepointControlAndTransit
IndonesianArchipelagicLanes
ObsNAVAREA XI Warning No. 26-0034 (originally issued 27 January 2026 and confirmed still in force as of July 2026 per SeaLagom active-messages page) notified mariners of seismic survey operations by S/V Ramform Sovereign towing 12 cables each 10,050 metres long in the Selat Makassar. The declared area is bounded approximately between 00-10.30S/117-49.00E and 00-32.00N/117-47.80E covering a significant portion of the northern Makassar Strait transit lane. The notice remained in force until further notice through the July 2026 window without cancellation. (Using publication date as proxy for continued-in-force confirmation date.)
AssessmentA long-endurance seismic survey with 12 cables each over 10 km in length occupying much of the northern Makassar Strait transit lane creates a persistent sub-surface hazard for commercial deep-draft traffic and any submerged platforms using ALKI II. The continued persistence of this notice through July without cancellation suggests the survey extended well beyond initial estimates and represents a meaningful constraint on routing freedom in the upper ALKI II corridor. Cross-domain ambiguity exists between legitimate commercial survey operations and potential intelligence-collection adjacency given the corridor context.
29 Jul 2026
RC07
S3 PLAN YJ-20 Hypersonic AShM Confirmed on Type 052D — First Official Disclosure
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → US
ObsPRC state broadcaster CCTV published footage on 29 July 2026 as part of a PLA 99th anniversary documentary trailer showing the first officially confirmed launch of a YJ-20 hypersonic anti-ship ballistic missile from the VLS of a Type 052D guided-missile destroyer. The YJ-20 has a range of 1500–2000 km and terminal speed estimated at up to Mach 9. The PLAN operates approximately 37 Type 052D destroyers. Janes confirmed this is the first known official depiction of a YJ-20 launch from a Type 052D.
AssessmentThe disclosure dramatically expands the number of PLAN hulls capable of conducting long-range hypersonic anti-ship strikes beyond the 10 Type 055s to potentially 37 Type 052Ds — a fleet-wide strike architecture change directly threatening carrier operations through the Luzon Strait and Bashi Channel. Timed ahead of PLA Founding Day (1 August) this constitutes deliberate strategic signalling. The Type 052Ds already documented in the Bashi Channel area now represent confirmed long-range carrier-kill threats to any CSG transiting the strait.
30 Jul 2026
RC07
S1 PLAN-CCG Combined Naval and Air Patrols at Scarborough Shoal
MaritimeContestation.MaritimeConfrontation
SouthChinaSea
China → Philippines
ObsOn 30 July 2026 China's military and coast guard conducted simultaneous patrols in the airspace and waters near Scarborough Shoal. The PLA Southern Theater Command issued a statement on the drills while the CCG confirmed law enforcement patrols including verbal warnings and water cannon deployment. China's CCG said it took measures to 'expel illegal and harassing vessels.' The patrols occurred against a backdrop of multiple confrontations in July and constituted a continuation of a pattern of high-tempo coordinated PLAN-CCG presence at the feature.
AssessmentConcurrent PLAN and CCG operations at Scarborough Shoal — with both commands issuing independent statements — signals growing coordination between military and law enforcement instruments at the shoal, consistent with AMTI data showing H1 2026 CCG ship-days at the shoal already approaching the full-year 2025 total; the pattern points toward attempted normalisation of dual-force presence as a precursor to tighter access control.
30 Jul 2026
RC07
S2 PLA Type 052D Destroyer Bashi Channel Presence Documented
MaritimeContestation.ChokepointControlAndTransit
LuzonStraitBashiChannel
China → US
ObsA US commercial Seasats Lightfish autonomous sea drone captured close-up footage of a PLAN Type 052D guided-missile destroyer operating approximately 105 km northwest of Luzon island in the Bashi Channel; CNN identified the vessel type from the 42-second clip. The footage was released publicly on 30 July 2026. The AFP confirmed on 31 July it was back-tracking the event. The vessel's presence was within Philippine waters. Event date of filming was June 16 but public disclosure and AFP verification occur within the July window (using publication date as proxy for this signal).
AssessmentThe footage confirms routine PLAN surface combatant presence in the Bashi Channel and demonstrates the growing effectiveness of low-cost USV maritime surveillance in detecting vessels that would otherwise operate undetected. A Type 052D in this position is within striking range of CSG transit lanes and Philippine northern islands. The AFP's reactive posture — learning of the contact via commercial media — highlights a maritime domain awareness gap that the US-Philippine alliance is only beginning to address through USV programs.
| S# | Date | RC | Indicator | Domain | Theatre | Mode | Mag | Effect | Conf | Source |
|---|---|---|---|---|---|---|---|---|---|---|
| S56 | 2026-07-06 | RC07 | PLAN SSBN Pacific SLBM Test — ALKI III Strategic Corridor Implication | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 5 | Signalling | Medium | ThinkTank |
| S3 | 2026-07-29 | RC07 | PLAN YJ-20 Hypersonic AShM Confirmed on Type 052D — First Official Disclosure | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | Overt | 5 | CapacityDisplay | Low | MediaReport |
| S57 | 2026-07-06 | RC07 | CCG East Taiwan — Continuous Presence Intent Assessment | MaritimeContestation.ChokepointControlAndTransit | TaiwanStrait | SubThreshold | 4 | Signalling | High | ThinkTank |
| S55 | 2026-07-06 | RC07 | Hormuz Re-closure Tanker Rerouting Pressure onto ALKI I | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 4 | Escalation | Low | MediaReport |
| S43 | 2026-07-09 | RC07 | Hormuz Crisis Re-escalation Drives Structural VLCC Rerouting via Lombok Strait — Ceasefire Collapse July 2026 | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 4 | Escalation | Low | MediaReport |
| S33 | 2026-07-16 | RC07 | Australia 2026 NDS/IIP Undersea Warfare Investment Directly Responsive to Chinese UUV Activity in Lombok ALKI II | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 4 | Deterrence | Medium | OfficialDocument |
| S25 | 2026-07-20 | RC06 | China–Philippines Violent Clash at Second Thomas Shoal – US MDT Reaffirmation | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 4 | Escalation | High | OfficialDocument |
| S23 | 2026-07-20 | RC07 | CCG-PN Physical Confrontation at Second Thomas Shoal — Sailor Injured | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 4 | Escalation | Low | MediaReport |
| S26 | 2026-07-20 | RC05 | Taiwan Conducts Interdepartmental Blockade-Resilience Supply Chain Drills | MaritimeContestation.CoastGuardAndMilitiaOperations | TaiwanStrait | Overt | 4 | Deterrence | Low | MediaReport |
| S8 | 2026-07-23 | RC07 | PRC Live-Fire Drills Executed — Western Taiwan Strait (23–24 July) | MaritimeContestation.ChokepointControlAndTransit | TaiwanStrait | Overt | 4 | Signalling | Low | MediaReport |
| S11 | 2026-07-23 | RC07 | Hormuz Closure Structural Rerouting — Sunda/Karimata as Primary Malacca Bypass | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 4 | Signalling | Low | MediaReport |
| S64 | 2026-07-01 | RC07 | VLCC Freight Market Confirms Lombok Re-routing Surge — TD3C and Bab el-Mandeb Dynamics in July 2026 | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 3 | CapacityDisplay | Low | MediaReport |
| S61 | 2026-07-02 | RC07 | PT PAL Scorpene Evolved Submarine Construction — Indonesian Undersea ALKI III Deterrent | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 3 | CapacityDisplay | Low | MediaReport |
| S60 | 2026-07-04 | RC05 | Record PLAN/CCG Maritime Mobilisation First Island Chain | MaritimeContestation.CoastGuardAndMilitiaOperations | SubThreshold | 3 | CapacityDisplay | Low | MediaReport | |
| S52 | 2026-07-07 | RC07 | India–Indonesia Sabang Port Development Agreement – Western Malacca Approach | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 3 | Signalling | Medium | OfficialDocument |
| S50 | 2026-07-07 | RC07 | Hormuz Breakdown Revives Malacca Toll-Regime Debate – Chokepoint Risk Repricing | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 3 | Escalation | Medium | ThinkTank |
| S49 | 2026-07-07 | RC07 | IOJI Maritime Domain Awareness Report: UUV and AIS Spoofing in Indonesian Waters (incl. ALKI II) | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 3 | Signalling | Medium | ThinkTank |
| S48 | 2026-07-08 | RC04 | Koizumi Ankara Statement — Japan Formally Internationalises SLBM Concern at NATO | MaritimeContestation.CoastGuardAndMilitiaOperations | EastChinaSea | Overt | 3 | Deterrence | Medium | OfficialDocument |
| S46 | 2026-07-08 | RC05 | OAC Minister Warns CCG Patrols Rewriting Taiwan Strait Status Quo | MaritimeContestation.CoastGuardAndMilitiaOperations | TaiwanStrait | SubThreshold | 3 | Signalling | Low | MediaReport |
| S47 | 2026-07-08 | RC05 | CCG Sustained Patrols East of Taiwan Signal New Permanent Presence | MaritimeContestation.CoastGuardAndMilitiaOperations | SubThreshold | 3 | Escalation | Low | MediaReport | |
| S44 | 2026-07-09 | RC07 | Chinese Academic Sovereignty Claim Over Batanes Islands — Lawfare Against Bashi Channel Denial Posture | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | SubThreshold | 3 | Signalling | Low | MediaReport |
| S42 | 2026-07-12 | RC03 | China Formal Rejection of 2016 Arbitral Award on 10th Anniversary | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | Overt | 3 | Signalling | Medium | OfficialDocument |
| S39 | 2026-07-14 | RC03 | Philippines DOJ Dedicated Maritime Law Unit Established | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | Overt | 3 | Deterrence | Medium | OfficialDocument |
| S37 | 2026-07-14 | RC07 | ReCAAP H1 2026 Half-Year Report – SOMS Incident Trend | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 3 | DeEscalation | Medium | OfficialDocument |
| S31 | 2026-07-17 | RC05 | Lanhai 201 Fisheries Research Vessel Surveys Taiwan Eastern EEZ | MaritimeContestation.CoastGuardAndMilitiaOperations | TaiwanStrait | Overt | 3 | Escalation | High | ThinkTank |
| S30 | 2026-07-17 | RC07 | PLA ADIZ Operations Elevated Sortie Spike July 17 | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | SubThreshold | 3 | Signalling | Low | MediaReport |
| S27 | 2026-07-19 | RC07 | PLAN Destroyer CNS Kaifeng Live-Fire Drill in Japan EEZ — Philippine Sea Approach to Luzon Strait | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | Overt | 3 | Escalation | Low | MediaReport |
| S24 | 2026-07-20 | RC07 | IOJI MDA Report Confirms Persistent Chinese UUV Pattern Across ALKI II Corridor — Three Devices April 2026 | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 3 | CapacityDisplay | Medium | ThinkTank |
| S19 | 2026-07-21 | RC04 | Japan Diplomatic Protest and Koizumi Farnborough Signal — EEZ Live-Fire | MaritimeContestation.CoastGuardAndMilitiaOperations | EastChinaSea | Overt | 3 | Signalling | Medium | OfficialDocument |
| S15 | 2026-07-21 | RC07 | Iranian Dark-Fleet VLCCs Routing via Lombok Strait with AIS Manipulation — Structural Pattern Confirmed July 2026 | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 3 | Escalation | Low | MediaReport |
| S17 | 2026-07-21 | RC07 | USNS Henson Survey Vessel in Penghu SW Waters | MaritimeContestation.ChokepointControlAndTransit | TaiwanStrait | Overt | 3 | Deterrence | Low | MediaReport |
| S16 | 2026-07-21 | RC07 | Indonesia Skips RIMPAC Naval Vessel — Deploys Flagship to Russia (Orruda 2026) | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 3 | Signalling | Low | MediaReport |
| S5 | 2026-07-24 | RC07 | PLA Declared Joint Combat Readiness Patrol — Multi-Aircraft SW ADIZ Penetration | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | SubThreshold | 3 | Signalling | Medium | OfficialDocument |
| S2 | 2026-07-30 | RC07 | PLA Type 052D Destroyer Bashi Channel Presence Documented | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | Overt | 3 | Signalling | Low | MediaReport |
| S62 | 2026-07-02 | RC07 | CCG Record Patrol Density at Scarborough Shoal | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 2 | Escalation | Medium | ThinkTank |
| S63 | 2026-07-02 | RC07 | Maritime Militia Near-Continuous Deployment at Scarborough as Area Denial Instrument | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 2 | Signalling | Medium | ThinkTank |
| S54 | 2026-07-07 | RC04 | CCG Armed Vessel Entry — Territorial Waters Senkaku / Approach to Zuihou Maru | MaritimeContestation.CoastGuardAndMilitiaOperations | EastChinaSea | SubThreshold | 2 | Escalation | Low | MediaReport |
| S41 | 2026-07-12 | RC07 | Indonesia ASEAN South China Sea Code of Conduct — 10th Anniversary Arbitration Milestone and ALKI Sovereignty Implications | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 2 | DeEscalation | Low | MediaReport |
| S38 | 2026-07-14 | RC07 | CCG Continued Presence in North Natuna Sea / ALKI I Approach Waters — July 2026 Pattern | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | SubThreshold | 2 | Signalling | Medium | ThinkTank |
| S34 | 2026-07-16 | RC07 | PRC MSA Vessel Transits Kinmen Prohibited Waters | MaritimeContestation.ChokepointControlAndTransit | TaiwanStrait | SubThreshold | 2 | Escalation | Low | MediaReport |
| S21 | 2026-07-20 | RC07 | Iran-flagged Tanker Transit and EOPL Dark Fleet STS Operations – July 2026 | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Deniable | 2 | Escalation | Medium | OfficialDocument |
| S18 | 2026-07-21 | RC07 | 17th US-Philippines-Japan Multilateral Maritime Cooperative Activity | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | Overt | 2 | Deterrence | Medium | MediaReport |
| S20 | 2026-07-21 | RC03 | Mutual Ambassador Summons – Bilateral Diplomatic Crisis | MaritimeContestation.CoastGuardAndMilitiaOperations | SoutheastAsia | Overt | 2 | Signalling | Low | MediaReport |
| S13 | 2026-07-22 | RC07 | USS George Washington CSG Westbound Transit of Luzon Strait — Philippine Sea to South China Sea | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | Overt | 2 | Deterrence | High | OfficialDocument |
| S14 | 2026-07-22 | RC03 | Philippines–China FM Mutual Protest Exchange at ASEAN-AMM Margins | MaritimeContestation.CoastGuardAndMilitiaOperations | SoutheastAsia | SubThreshold | 2 | Signalling | Low | MediaReport |
| S12 | 2026-07-22 | RC07 | Philippines–China–US ASEAN FM Bilateral — Wang Yi Bitter Consequences Warning | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 2 | Escalation | Medium | OfficialDocument |
| S1 | 2026-07-30 | RC07 | PLAN-CCG Combined Naval and Air Patrols at Scarborough Shoal | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 2 | CapacityDisplay | Low | MediaReport |
| S65 | 2026-07-01 | RC07 | MPA Singapore NtM Ed. 7/2026 – Sunken Vessel and Batu Berhanti Buoy Removal | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 1 | Signalling | Medium | OfficialDocument |
| S59 | 2026-07-05 | RC07 | Armed Robbery at Sea – Tanker in Transit | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 1 | Signalling | Low | MediaReport |
| S58 | 2026-07-06 | RC04 | JASDF Scramble — Chinese Aircraft East China Sea (SLBM Day) | MaritimeContestation.CoastGuardAndMilitiaOperations | EastChinaSea | Overt | 1 | Signalling | Medium | OfficialDocument |
| S53 | 2026-07-07 | RC07 | PLA Aircraft and PLAN Ship Sustained Operations Around Taiwan — Southwestern ADIZ Entries | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | SubThreshold | 1 | Signalling | Medium | OfficialDocument |
| S51 | 2026-07-07 | RC07 | KRI I Gusti Ngurah Rai Pacific Transit Northbound — ALKI III Egress | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | Overt | 1 | Signalling | Low | MediaReport |
| S45 | 2026-07-08 | RC07 | CCG Kinmen Formation Incursions — Four Occurrences July | MaritimeContestation.ChokepointControlAndTransit | TaiwanStrait | SubThreshold | 1 | Escalation | Medium | OfficialDocument |
| S40 | 2026-07-13 | RC03 | Chinese Vessel Concentration in Philippine EEZ | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 1 | Escalation | Low | MediaReport |
| S36 | 2026-07-15 | RC06 | Malaysia-Indonesia Malindo Patkor Siri I 2026 Joint Air Patrol over Strait of Malacca | MaritimeContestation.ChokepointControlAndTransit | Regionwide | Overt | 1 | Deterrence | Low | MediaReport |
| S35 | 2026-07-15 | RC07 | Port Klang Congestion Surge – Yard Density 90–95% and Vessel Delays 2–3 Days | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 1 | Signalling | Low | MediaReport |
| S32 | 2026-07-16 | RC07 | Malindo Patkor Aerial Series 1/26 – First Joint Air Patrol of 2026 over Malacca Strait | MaritimeContestation.ChokepointControlAndTransit | SoutheastAsia | Overt | 1 | Deterrence | Low | MediaReport |
| S28 | 2026-07-18 | RC07 | NAVAREA XI Warning 26-0324 — Hazardous Operations Zone North of Luzon in Luzon Strait Approach | MaritimeContestation.ChokepointControlAndTransit | LuzonStraitBashiChannel | Overt | 1 | Deterrence | Medium | OfficialDocument |
| S29 | 2026-07-18 | RC03 | DND Pledges Sustained Military Asset Deployment in WPS | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | Overt | 1 | Deterrence | Medium | OfficialDocument |
| S22 | 2026-07-20 | RC07 | BRP Sierra Madre Resupply Mission Conducted Under CCG Confrontation Conditions — July 2026 | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 1 | Escalation | Low | MediaReport |
| S9 | 2026-07-23 | RC07 | CCG Vessel Departure from Second Thomas Shoal to Mischief Reef Post-Incident | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | SubThreshold | 1 | DeEscalation | Low | MediaReport |
| S10 | 2026-07-23 | RC07 | Philippine DFA Formal Sovereignty Statement on Ayungin RORE Arrangement | MaritimeContestation.MaritimeConfrontation | SouthChinaSea | Overt | 1 | Signalling | Medium | OfficialDocument |
| S7 | 2026-07-24 | RC03 | CCG Water Cannon Day 2 with Maritime Militia Escort – Scarborough Shoal | MaritimeContestation.CoastGuardAndMilitiaOperations | SouthChinaSea | SubThreshold | 1 | Escalation | Low | MediaReport |
| S6 | 2026-07-24 | RC03 | CCG 'Control Measures' Statement – Third Incident Scarborough Shoal | MaritimeContestation.CoastGuardAndMilitiaOperations | SouthChinaSea | SubThreshold | 1 | Signalling | Medium | OfficialDocument |
| S4 | 2026-07-27 | RC07 | NAVAREA XI No. 26-0034 Seismic Survey Persisting in Selat Makassar (S/V Ramform Sovereign) | MaritimeContestation.ChokepointControlAndTransit | IndonesianArchipelagicLanes | SubThreshold | 1 | Signalling | Low | NAVAREANotice |
© 2026 Indo-Pacific Studies Center · CC BY-NC-ND 4.0 · www.indo-pacificstudiescenter.org
Indo-Pacific Chokepoints · Strategic Brief · Issue #001