Gateway Access Monitor
A companion series to the Logistics Growth Index (LGI) tracking how reliably shippers can secure passage through the world’s maritime chokepoints — capacity, waiting, price and eligibility. Every figure is checked against its cited source; dataData as of .
Forthcoming (v1.1): notice of a change from a later edition
From October, the Gateway Access Monitor publishes on the 1st of each month at 09:00 UTC; the October edition follows on 1 October 2026 (announced 16 September; methodology v1.1, publishing with that edition, formalises the change). From the October 2026 edition each fully assessed gateway will also carry an evidence-confidence label — a stated rollup of the per-figure evidence labels — and the methodology gains an annex documenting the revision behaviour of high-frequency sources. Definitions publish with v1.1.
This month at a glance
Panama Canal
29.0
transits/day (Aug)
Ship traffic, 1–20 September: 28.6 a day, 8% below its 2025 average
Since the last edition: 2 of 8 applicable measures worse (effective capacity and cost of secured passage); 6 stable
Read the assessment for Panama Canaltransits/day (Aug)
Suez Canal ship traffic, 1–20 September: 41.0 a day, 46% below its June 2023 level
Since the last edition: All 7 applicable measures stable
Read the assessment for Suez Canal / Red Seatransits/day (Aug)
Ship traffic, 1–20 September: 3.9 a day, 96% below its June 2023 level
Since the last edition: 2 of 6 applicable measures worse (cost of secured passage and access uniformity); 4 stable
Read the assessment for Strait of Hormuz
The counts show change since the last edition, not severity: a chokepoint can be stable at a severely restricted level. They are not a score or a ranking and are not comparable between chokepoints; measures that do not apply at a chokepoint are left out of its count.
Released 10 September 2026, 05:38 UTC. The October 2026 edition publishes on 1 October 2026, 09:00 UTC. Last corrected on 10 October 2026 · Corrections log
How to read this page
The Gateway Access Monitor assesses, each month, how reliably commercial users can secure passage through seven of the world’s principal maritime chokepoints. Three — the Panama Canal, the Suez Canal / Red Sea and the Strait of Hormuz — receive a full assessment across eight measures of access; all seven appear in the ship-traffic table.
The eight measures
- Nominal capacity
- — the maximum sustainable number of transits a day that the operating authority states — the capacity the gateway was designed for
- Effective capacity
- — the daily cap, restrictions and outages in force — what present conditions permit
- Reservable capacity
- — booking slots offered per day and the share booked — what a user can actually reserve
- Waiting time
- — time spent in the gateway's waters as the authority publishes it, for all traffic (for Panama, Canal Waters Time, which includes the transit itself); where no statistics are published, it is read on observed queue evidence
- Cost of secured passage
- — what securing passage costs beyond the standard tariff: auction premiums, surcharges, war-risk cover
- Allocation rules
- — how scarce access is allocated — booking windows, auctions, convoy scheduling, security routing
- Access uniformity
- — whether access terms are equal for every user or depend on who the user is
- Recovery flexibility
- — the published rules for recovering a failed or changed arrangement: substitution, transfer, cancellation terms, rebooking priority, rerouting options
“Not applicable”: the dimension does not exist under the gateway's regime; it carries no direction and is left out of the count. “No comparison”: the dimension was not applicable in the previous edition, or the allocation regime changed; it is left out of that month's count.
Change, not level
Each measure is read against the previous edition as improving, stable or deteriorating — in this page’s summaries, better, stable or worse — with a one-line reason. The headline reading for each chokepoint, for example “1 of 8 applicable access dimensions deteriorating”, counts the measures that worsened since the last edition. It shows change, not severity: a chokepoint can be stable at a severely restricted level. Severity is read from traffic against the reference level, the access state and the stability columns of the ship-traffic table. Stable means a count in whole units (slots or transits a day) that did not change, another quantity that moved by less than 5%, or governing rule text that did not change; where findings within a measure conflict, the direction follows the finding that binds passage for the marginal unreserved user, and the conflict is stated (methodology §4).
Not a score or a ranking
The counts are not a score, a rating or a ranking, and they are not comparable between chokepoints. The Monitor publishes no composite score, no ranking of chokepoints and no numeric forecast; each outlook is qualitative and states its basis. Readings are observed — based on published operational evidence, not private booking outcomes — and they do not enter the Logistics Growth Index (LGI).
How passage is allocated, and for whom
Each fully assessed chokepoint carries one allocation-regime tag; the access state in the ship-traffic table is a short description, not a tag. The tags are not ranked from best to worst, and a change of tag is not by itself an improvement or a deterioration. Where more than one mechanism operates, the tag is the mechanism through which the operating authority allocates passage, and any security constraint is named as secondary.
- Unconstrained
- — passage is not rationed
- Queue-rationed
- — ships wait their turn in a queue
- Convoy-scheduled
- — ships pass in scheduled convoys
- Reservation-rationed
- — passage is rationed through limited daily booking slots; with the modifier auction-binding, standard booking slots are exhausted and additional slots are allocated by auction
- Security-constrained
- — the security situation is the main limit on passage
Access uniformity — whether every ship gets the same terms — is graded on a fixed ladder of decreasing predictability. Published rules and observed practice are both read, and the published rung is the lower of the two; “both” means the rung is seen in published rules and in observed practice.
- Uniform
- — the same terms for every user
- Rule-differentiated
- — transparent rules differentiate by price, vessel class, cargo type or booking window
- Identity-conditional
- — access varies by flag, affiliation, ownership or destination
- Permissioned-discretionary
- — access is granted case by case
Evidence labels
Every figure carries one of five labels (methodology §5):
- Primary-published
- — The authority's own published figure
- Derived
- — Computed by WRI from primary figures by a stated method
- Third-party estimate
- — An attributed external estimate
- Press-reported
- — Reported in press; not published by the authority
- WRI floor or range
- — A stated bound where no point value is observable
Reference levels
Traffic is compared with a stated reference level. June 2023 — a full month of undisrupted traffic before the Red Sea attacks on shipping began in November 2023 — is the reference for Suez, Bab el-Mandeb and the Cape of Good Hope, and the common reference for Hormuz, Malacca and Gibraltar, with February 2026, the last full month before Hormuz transits collapsed in March 2026, printed alongside for Hormuz. Panama’s reference is its calendar-2025 average — the last full calendar year without a draft restriction or a reduction of the daily slot offer. The counts are monthly means computed by WRI from IMF PortWatch’s daily counts, with no seasonal adjustment.
Codes and abbreviations
- A-numbers (A-36, A-36-2026)
- — Panama Canal Authority advisories to shipping, numbered within the year: A-36-2026 is advisory 36 of 2026; N-numbers are its notices to shipping
- ACP
- — Autoridad del Canal de Panamá — the Panama Canal Authority
- Canal Waters Time (CWT)
- — the ACP's published time ships spend in canal waters — waiting plus the transit itself
- Queue Planning Ratio (QPR)
- — a WRI supplementary indicator for Panama: how much worse the month's highest published Canal Waters Time was than the average day's, after subtracting the in-transit time
- Neopanamax, Panamax
- — vessel classes sized for the Panama Canal's expanded locks (opened 2016) and for its original locks
- LoTSA
- — Long-Term Slot Allocation — one of the ACP's booking periods
- TTA
- — Total TEU Allowance — the container-capacity measure the ACP's booking rules use to allocate container-ship slots
- TFW
- — Tropical Fresh Water — the reference in which Panama's maximum draft is stated
- Gatun Lake
- — the reservoir that supplies the water for the Panama Canal's locks
- AIS
- — Automatic Identification System — the position signals ships broadcast; ship-tracking counts are built from them, and a ship with its transponder off is not seen at first count
- IMF PortWatch
- — the International Monetary Fund's platform that publishes daily transit counts at chokepoints from AIS data (sources: Kpler; UN Global Platform)
- Vintage (PortWatch vintage)
- — the date a data series was retrieved — for PortWatch, the daily transit series; later vintages revise earlier days
- Kpler
- — a commercial ship-tracking data company, one of PortWatch's named sources
- SCA
- — Suez Canal Authority
- BeM
- — Bab el-Mandeb — the strait at the southern entrance to the Red Sea
- UKMTO
- — United Kingdom Maritime Trade Operations — a Royal Navy centre that issues incident warnings to merchant shipping; warning numbers carry the year (146-26 is warning 146 of 2026)
- VRA
- — Voluntary Reporting Area — the sea area in which UKMTO asks merchant ships to report
- JMIC
- — Joint Maritime Information Center — the Combined Maritime Forces' centre that publishes threat advisories for shipping
- MARAD, MSCI
- — the US Maritime Administration, which issues US maritime security advisories through its Maritime Security Communications with Industry (MSCI) portal, numbered by year (2026-011)
- NAVCENT, NCAGS
- — US Naval Forces Central Command, and its Naval Cooperation and Guidance for Shipping function, which coordinates with merchant ships
- CENTCOM
- — US Central Command
- Aspides
- — EUNAVFOR Aspides — the European Union's naval operation that protects and escorts merchant ships in the Red Sea area
- HOCC
- — Humanitarian Operations Coordination Center — the Houthi-run body that addresses notices to shipping
- EEAS
- — European External Action Service — the EU's diplomatic service
- PGSA
- — Persian Gulf Strait Authority — the Iranian body that issues case-by-case permits for passage of the Strait of Hormuz
- IRGC
- — Iran's Islamic Revolutionary Guard Corps; the IRGC Navy is its naval arm
- OFAC
- — the US Treasury's Office of Foreign Assets Control (sanctions)
- IMO
- — International Maritime Organization, the UN agency for shipping; “IMO” followed by a seven-digit number is a ship's IMO identification number
- NAVAREA IX
- — the international navigational-warning area that includes the Strait of Hormuz; its warnings are issued by the Pakistan Navy Hydrographic Department as area coordinator
- JWC / LMA
- — the Joint War Committee of the Lloyd's Market Association, which lists areas of heightened war risk for marine insurance
- Gemini (AE5, AE11, AE12, ME2 …)
- — the Gemini Cooperation of Maersk and Hapag-Lloyd; AE5, AE11, AE12 and ME2 are codes of its container services
- MSC
- — Mediterranean Shipping Company, the container line; in “Oman MSC”, Oman's Maritime Security Centre
- LNG, LPG
- — liquefied natural gas, liquefied petroleum gas
- VLCC
- — very large crude carrier — a supertanker
- Baltic TD3C, MEG, TCE
- — the Baltic Exchange's TD3C assessment of very large crude carrier freight from the Middle East Gulf (MEG) to China; TCE, time-charter equivalent, states freight as earnings per day
- STS
- — ship-to-ship transfer of cargo at sea
- RoRo
- — roll-on/roll-off ships, which carry vehicles driven on and off
- DG
- — dangerous goods — hazardous cargo
- TEU
- — twenty-foot equivalent unit — the standard measure of container capacity
- bpd, mb/d
- — barrels per day, million barrels per day
- NOAA CPC
- — the US National Oceanic and Atmospheric Administration's Climate Prediction Center
- ENSO
- — El Niño–Southern Oscillation — the Pacific climate cycle of El Niño and La Niña conditions
- IMHPA
- — Panama's Institute of Meteorology and Hydrology (Instituto de Meteorología e Hidrología de Panamá)
- LSEG
- — London Stock Exchange Group (its market-data service)
- ETA, ETD
- — estimated time of arrival, estimated time of departure
- UTC
- — Coordinated Universal Time
Full definitions: the Gateway Access Monitor methodology (v1.0).
Comparable core — monitored chokepoints
Ship traffic at seven chokepoints
The same measure at every chokepoint: daily ship transits counted by IMF PortWatch from ship-tracking (AIS) signals
- Panama Canal28.6 a day*
−8% against its 2025 average of 31.1
Reservation-rationed (auction-binding), cuts in force
Previous month 29.0 · days below recent level† 0 of 20 · volatility‡ 0.00
- Suez Canal41.0 a day*
−46% against its June 2023 level of 75.3
Convoy-scheduled; security routing secondary
Previous month 41.0 · days below recent level† 0 of 20 · volatility‡ 0.11
- Bab el-Mandeb25.9 a day*
−66% against its June 2023 level of 76.5
Security-constrained, worsening
Previous month 27.4 · days below recent level† 0 of 20 · volatility‡ 0.08
- Strait of Hormuz3.9 a day*
−96% against its June 2023 level of 102 · February 2026 level: 78.3
Identity-conditional access
Previous month 4.7 · days below recent level† 9 of 20 (6) · volatility‡ low count
- Malacca Strait219.9 a day*
+1% against its June 2023 level of 218.6
Unconstrained
Previous month 211.5 · days below recent level† 0 of 20 · volatility‡ 0.06
- Gibraltar Strait133.3 a day*
−10% against its June 2023 level of 148.8
Unconstrained (flow shift)
Previous month 128.6 · days below recent level† 0 of 20 · volatility‡ 0.07
- Cape of Good Hope86.1 a day*
+67% against its June 2023 level of 51.6
Diversion route (mirror)
Previous month 90.3 · days below recent level† 0 of 20 · volatility‡ 0.12 ⚑
* Month to date — daily AIS calls to 20 September 2026, the latest day in the PortWatch vintage retrieved 24 September 2026; PortWatch updates weekly and revises earlier days, and reference values are recomputed from the current vintage at each edition. Sources: Kpler; UN Global Platform; IMF PortWatch (portwatch.imf.org) — used under the IMF’s Use of IMF Data terms. WRI’s monthly means of the ACP’s own figures: Panama series (CSV) — a different population from this table · provenance.
† Days whose 7-day rolling mean sits below 80% of the previous month’s mean (longest consecutive run in brackets) — how far the month fell short of its own recent level. ‡ Day-to-day volatility net of counting noise; ⚑ marks variance more than twice the mean; “low count” = under 10 transits/day, where only the day counts are read.
Panama Canal
- How passage is allocated
- Reservation-rationed (auction-binding) — passage is rationed through limited daily booking slots; standard booking slots are exhausted and additional slots are allocated by auction
- Same terms for every ship?
- Rule-differentiated (both: in published rules and in observed practice) — transparent rules differentiate by price, vessel class, cargo type or booking window
- Since the last edition
- 2 of 8 applicable measures worse — effective capacity and cost of secured passage; 6 stableHeadline reading: 2 of 8 applicable access dimensions deteriorating · observed reading — based on published operational evidence, not private booking outcomes
In brief
34/day in force from 4 Sep, 32/day from 15 Sep (A-29); A-31 rewrites Neopanamax booking from 13 Sep; record ≈US$5.3M auction premium (24 Aug, press-reported).
What changed since the last edition
Direction by dimension (8 applicable) — Methodology §4 · what each measure means
- Nominal capacity — stable: The stated design range (36–38/day) is unchanged.
- Effective capacity — deteriorating (worse): The A-29 measures take effect this month — the 48.0 ft draft limit in force since 2 Sep, slots to 34/day from 4 Sep and 32/day from 15 Sep against 36 before the cuts — while A-33 (4 Sep) cancels the further 47.5 ft step scheduled for 1 Oct, easing the forward outlook without changing the in-month constraint
- Reservable capacity — stable: 63 Neopanamax slots a week under A-31 equals the 9/day of A-29 — the offered quantity is unchanged; how it is allocated changed (see Allocation rules).
- Waiting time — stable: No new monthly authority figure at the data cut — the ACP's August operations summary follows in the October edition; July CWT 25.4h stands as the latest monthly measure.
- Cost of secured passage — deteriorating (worse): The record auction premium moved from ≈US$4.0M (10 Aug) to US$4.6M (~12 Aug) to ≈US$5.3M (24 Aug, press-reported; confirmed to press by the ACP).
- Allocation rules — stable: A-31 lifts per-customer and consecutive-date limits and adds segment minimums — rules rewritten; the binding constraint for the marginal unreserved user, slot scarcity under A-29's totals, is unchanged.
- Access uniformity — stable: The rung (Rule-differentiated, published and observed) and the published differentiation criteria are unchanged.
- Recovery flexibility — stable: No net change since the August reading: A-32-2026 (2 Sep) postponed the late-cancellation surcharge until further notice before it took effect, and the Last-Minute suspension and A-30/A-31 rules stand as August recorded them.
Codes and names in this section: A-11 to A-35: Panama Canal Authority advisories to shipping · ACP: the Panama Canal Authority · CWT: time in canal waters, waiting plus transit · QPR: WRI's supplementary queue indicator for Panama · Neopanamax, Panamax: ship classes for the canal's 2016 and original locks · TTA: Total TEU Allowance, an ACP container-capacity measure · TFW: Tropical Fresh Water, the draft reference · Gatun Lake: the reservoir that feeds the canal's locks · AIS: the position signals ships broadcast · OFAC: US Treasury sanctions office · IMO: International Maritime Organization; with seven digits, a ship's number · LNG, LPG: liquefied natural gas, liquefied petroleum gas · RoRo: roll-on/roll-off vehicle ships · TEU: twenty-foot container unit · NOAA CPC: the US Climate Prediction Center · ENSO: El Niño–Southern Oscillation.
Daily capacity: stated, booking slots offered and ships observed
- Nominal capacity
- 36–38/day
- In force from 4 Sep (A-29)
- 34/day
- From 15 Sep (A-29)
- 32/day
- Observed transits (Aug, AIS)
- 29.0/day
Key figures and evidence
Each figure shows its evidence label; open it for the full text and its source, where linked.
Canal Waters TimePrimary-published
25.4h average in July (published In-Transit Time 10.9h, so the average queue component was ~14.5h; monthly high 41.1h) against a ~20h 2025 baseline; the ACP's August operations summary had not been published at this edition's data cut — August CWT follows in the October edition.
Evidence label: Primary-published — The authority's own published figure.
Booking regime (A-31, in force)Primary-published
A-31-2026 (issued 28 Aug, effective 30 Aug for booking dates from 13 Sep) rewrites Neopanamax allocation: 63 slots a week with published segment minimums (full-container ≥5 per date allocated by Total TEU Allowance (TTA) capacity, LPG 3 per date, LNG 3 a week, and vehicle carriers/RoRo, bulkers and other segments 3 a week), per-customer and consecutive-date limits lifted, customer-ranking tiebreak, and a daily auction slot from leftovers at the opening of Booking Period 3. Rules rewritten, not eased: the slot totals of A-29 stand, and the ACP states booking remains the only way to guarantee a transit date.
Evidence label: Primary-published — The authority's own published figure.
Cost of secured passagePress-reported
Record ≈US$5.3M auction premium (auction 24 Aug; Bloomberg 25 Aug; confirmed to press as the highest ever by the ACP's designated administrator on 28 Aug — the ACP publishes auction volumes and a registered-access bid distribution, not individual winning bids). Prior record US$4.6M (~12 Aug); Neopanamax average ≈US$2.5M (Argus). Documented auction record below. Documented auction outcomes
Evidence label: Press-reported — Reported in press; not published by the authority.
Announced measuresPrimary-published
A-29-2026 (20 Aug): slots to 9/day Neopanamax + 25/day Panamax (total 34) for booking dates from 4 Sep, stepping to 23/day Panamax (total 32) from 15 Sep. Maximum Neopanamax draft 14.63 m (48.0 ft) TFW in force since 2 Sep (postponed by the same advisory from 26 Aug); A-33-2026 (4 Sep) postpones the further step to 14.48 m (47.5 ft) TFW — previously scheduled for 1 Oct — until further notice, citing Gatun Lake levels and weather projections; 48.0 ft remains in force. Ilya Espino de Marotta took office as ACP administrator on 7 Sep (seven-year term).
Evidence label: Primary-published — The authority's own published figure.
Queue Planning Ratio (supplementary)Derived
July reading 2.1 (bracket 1.9–2.2): the month's worst published day implied a queue about twice the average day's — worst-day queue ≈27.7h against an average ≈14.5h, computed from the ACP's published Canal Waters Time (25.4h avg, 41.1h high) and In-Transit Time (9.5–13.5h). Differences under 0.1 are not read as movement. QPR series (CSV)
Evidence label: Derived — Computed by WRI from primary figures by a stated method.
Waiting timePress-reported
Between its monthly summaries the ACP publishes a daily count of the vessels in queue at 00:01, by lock class, in its daily customer report; this edition did not use it. Bloomberg (28 Aug) reported 14 unbooked vessels waiting against 115 scheduled; a press-reported 19-day figure for unbooked gas carriers is an Argus segment estimate that Bloomberg's own later version withdrew, and is not used here.
Evidence label: Press-reported — Reported in press; not published by the authority.
Access uniformityPrimary-published
Rule-differentiated (both): transparent, published rules differentiate by vessel class, cargo segment, TTA capacity, booking tier and willingness-to-pay; customer-ranking tiebreaks are published rules, not identities. Gatekeepers: ACP; insurer collectives; OFAC (extraterritorial).
Evidence label: Primary-published — The authority's own published figure.
Recovery flexibilityPrimary-published
Narrowing as recorded in August, unchanged this month — the Last-Minute service stays suspended (A-28); the late-cancellation surcharge (tariff 1050.IBC9) scheduled for 1 September was postponed until further notice before taking effect (A-32-2026, 2 Sep; a new date will come by advisory); A-30 routes cancelled slots into a Special Competition; A-31 permits swaps, substitutions and some date changes for Neopanamax within the new weekly caps — published rules only. Observed privately-arranged workarounds (a Panamax LPG shuttle transferring to a Neopanamax off Balboa; one VLGC repositioning in ballast around South America, press-reported) are recorded as context and carry no direction.
Evidence label: Primary-published — The authority's own published figure.
Advisory count (automated title screen)Derived
14 ACP advisories in 2026 to the 3 Sep archive retrieval whose titles carry booking, transit, draft, condition, surcharge, slot, auction, reservation, modification or cancellation terms — an activity count from an automated screen of advisory titles, not a count of rule changes; titles without those terms are not captured (A-29-2026 is not counted). 2025: 12; 2023: 32. Advisories counted (CSV)
Evidence label: Derived — Computed by WRI from primary figures by a stated method.
WatchPrimary-published
Hydrology, not demand, is the binding constraint; the ACP names the January–April 2027 dry season as the concern window. Scenario statements, not rules: the FT (7 Sep) reports an ACP-modelled worst case of 27 daily transits in coming months on the 1997-rainfall pattern, and the administrator separately told AFP a fall to about 29 is possible in February–March — two distinct scenario chains; the in-force schedule remains A-29/A-33.
Evidence label: Primary-published — The authority's own published figure.
Reported auction prices
Documented auction outcomes (record, not a series — carries no direction)
| Auction | Vessel | Segment | Premium (US$) | Report status | ACP status | Rules in force |
|---|---|---|---|---|---|---|
| 8 April 2026 | Gas Virgo | LPG | 4,000,000 | press-reported | ACP acknowledged results above US$1M; figure not confirmed | pre-A-28 (Notice N-7-2026 booking rules) |
| 10 August 2026 | Seaspan Benefactor | Full container | 4,000,000 | press-reported (approximate: 'about US$4 million') | ACP declined comment | pre-A-28 |
| 12 August 2026 | G. Arete | LPG | 4,600,000 | press-reported (brokers/traders) | none | pre-A-28 (A-28 issued 20 Aug) |
| 24 August 2026 | G. Spirit (IMO 9797876) | LPG | 5,300,000 | press-reported (Bloomberg; 'people familiar') | confirmed as highest ever to press by designated administrator (Panama America/AFP 28 Aug); no ACP document | A-28 in force; A-29 slot cuts announced (4 Sep/15 Sep); A-31 not yet issued |
Outlook
Outlook — hydrological. NOAA CPC assigns a greater-than-90% probability of a very strong El Niño persisting into 2027; the ACP reports watershed rainfall 34% below and inflows 44% below historical averages, and frames A-29's slot and draft steps as water-conservation measures. Directionally: further slot and draft reductions remain more likely than relief.
Update — 15 September. The ACP’s August operations summary (A-34, posted 10 September, after this edition’s release) is now available: average Canal Waters Time rose to 34.90 hours (monthly high 69.41) from July’s 25.38 — a 37.5% increase; the edition’s waiting-time direction, stable on the information available at its cut, is unchanged, and the August figures inform the October reassessment — with in-transit time at 11.27 hours and oceangoing transits averaging 33.19/day. The same advisory publishes booking-slot utilisation by class (Neopanamax 98.3% of offered slots used in August; auctioned slots 89.9%) and schedules an 11-day Panamax culvert outage for 22 September–3 October. Booking dates from 15 September run under the reduced 32-slot offer (A-29), and the revised Neopanamax allocation rules (A-31) apply to booking dates from 13 September — overlapping changes whose effects this page separates before attributing either. Full incorporation at the October edition.
Update — 20 September. ACP Advisory A-35-2026 (16 September, effective immediately) clarifies that the consecutive-booking-date restriction in the Panamax locks applies only within a single booking period — consecutive transit dates drawn from different booking periods are permitted, subject to availability and the other reservation requirements. A loosening interpretation on day two of the 32-slot regime; slot totals and the other A-28 rules are unchanged. The tentative eleven-day Panamax culvert outage (22 September – 3 October) begins within the current booking regime; the maintenance schedule lists estimated Panamax capacity of 23 during the window — within, not additional to, the 15 September slot reduction. Booking utilisation, premiums, waiting and completed transits through the window feed the October edition. Direction calls change only at the October edition.
Update — 23 September. One business day into the tentative culvert-maintenance window (22 September – 3 October), no advisory confirms or postpones commencement; the governing document remains A-11-2026 and the window is recorded as unconfirmed rather than in force. Booking utilisation, premiums, waiting and completed transits continue to be observed through the window for the October edition. Direction calls change only at the October edition.
Sources for this assessment
Sources: ACP Advisories to Shipping (A-28/29/30/31/32-2026, retrieved 23 Aug–3 Sep), ACP Monthly Canal Operations Summaries (parsed Feb 2022–Jul 2026), IMF PortWatch daily transit calls, NOAA CPC ENSO advisory, Bloomberg and Argus (press-reported, labelled).
Suez Canal / Red Sea
- How passage is allocated
- Convoy-scheduled (security routing secondary) — ships pass in scheduled convoys; security routing also applies, as a secondary constraint
- Same terms for every ship?
- Identity-conditional (both: in published rules and in observed practice) — access varies by flag, affiliation, ownership or destination
- Since the last edition
- All 7 applicable measures stableHeadline reading: all 7 applicable access dimensions stable · observed reading — based on published operational evidence, not private booking outcomes
In brief
~54% of pre-crisis traffic; Cape diversion +75% over reference; war-risk differentiated by affiliation (press-reported). Regime tag re-labelled under Methodology v1.0 — no change in how passage is allocated.
What changed since the last edition
Direction by dimension (7 applicable) — Methodology §4 · what each measure means
Not applicable here, so not counted: reservable capacity.
- Nominal capacity — stable: No change in stated capacity or channel specifications.
- Effective capacity — stable: 41.0/day in August against 41.9 in July — a 2.1% move inside the edition's 5% stability band.
- Waiting time — stable: The convoy structure and the ~24h missed-convoy interval are unchanged.
- Cost of secured passage — stable: Press-reported war-risk levels and the SCA tariff position are unchanged since the August edition; the container-dues circular predates it.
- Allocation rules — stable: Two daily convoys with published cutoffs — the governing rule text is unchanged.
- Access uniformity — stable: The rung is unchanged; v1.0 grades it Identity-conditional on the same published targeting criteria and underwriting practice the August edition recorded.
- Recovery flexibility — stable: No published SCA rule changed.
Codes and names in this section: AIS: the position signals ships broadcast · Vintage: the date a data series was retrieved · SCA: Suez Canal Authority · UKMTO: UK Maritime Trade Operations (Royal Navy) · JMIC: Joint Maritime Information Center · Aspides: the EU naval operation protecting Red Sea shipping · IMO: International Maritime Organization; with seven digits, a ship's number · JWC / LMA: Lloyd's market committee listing war-risk areas · Gemini: Maersk–Hapag-Lloyd network; AE and ME codes name its services · MSC: Mediterranean Shipping Company; Oman MSC: Oman's Maritime Security Centre · TEU: twenty-foot container unit.
Key figures and evidence
Each figure shows its evidence label; open it for the full text.
TransitsDerived
41.0/day (Aug, complete month) vs 75 pre-crisis observed — a plateau near half of normal for more than two years; a design capacity near 97/day is widely cited, though the SCA's public pages carry channel specifications rather than a vessels-per-day figure. Movement against July (−2.1%) is inside the edition's 5% stability band: read as stable.
Evidence label: Derived — Computed by WRI from primary figures by a stated method.
The diversion mirrorDerived
Cape of Good Hope traffic 90.3/day vs 51.6 June-2023 reference (+75%) — the rerouted cohort, visible daily.
Evidence label: Derived — Computed by WRI from primary figures by a stated method.
Bab el-MandebDerived
27.4/day in August — a new low, still deteriorating.
Evidence label: Derived — Computed by WRI from primary figures by a stated method.
Reservable capacityPrimary-published
Not applicable — the SCA operates convoy scheduling (two daily convoys with published cutoff times), not slot booking; no reservation product exists.
Evidence label: Primary-published — The authority's own published figure.
Cost of secured passagePress-reported
The access price is war-risk insurance, differentiated by affiliation — around 0.5% of hull value for Bab el-Mandeb cover and 1–2% southern Red Sea at recent press-reported levels. SCA transit-dues circulars adjust the published tariff (No. 2/2026, containerships, June 2026); rates sit in agents' schedules, not an open SCA table.
Evidence label: Press-reported — Reported in press; not published by the authority.
Access uniformityPress-reported
Identity-conditional (both): Israeli-linked vessels de facto barred; elevated targeting of US-linked tonnage; underwriters screen affiliation. Houthi published criteria explicitly name Israel-, US- and UK-affiliated vessels and advise against switching off AIS. Gatekeepers: Houthi forces (non-state), Lloyd's JWC/LMA, SCA (formally neutral), US/EU/UK sanctions authorities. Update, 11 September: following the reported capture of Mocha, the Houthi-run Humanitarian Operations Coordination Center stated navigation remains safe “except for Saudi vessels” (via Reuters) — an attributed extension of the identity criteria to a fourth named class, not an independent assurance of safe passage; direction calls are read against the full month at the October edition.
Evidence label: Press-reported — Reported in press; not published by the authority.
Recovery flexibilityPress-reported
Convoy rescheduling only — a missed convoy waits ~24h for the next; press-reported cancellation charges run US$1,000–5,000 by timing and vessel size; no substitution or rebooking-priority rights are published by the SCA.
Evidence label: Press-reported — Reported in press; not published by the authority.
Outlook
Outlook — none announced. Recovery evidence strengthened but the persistence test — completed at this edition's release refresh, with the daily series now running to 6 September — is not passed: Lloyd's List Intelligence tracked a second consecutive elevated week (290 transits 24–30 August, ~30% above 2025, still ~36% below normal on its own AIS weekly series), Drewry reported carriers adding Suez transits, and containership transits reached 196 in August (+36% year on year yet ~65% below August 2023; MDS Transmodal) — but on the daily PortWatch series (five ship types) this edition reads, the 7-day rolling mean held at or above the July mean for at most seven consecutive days (21–27 August) against the fourteen the methodology requires, so no recovery classification is made. The returning traffic is segment-specific: Lloyd's List Intelligence records year-on-year gains across bulk, container, tanker and vehicle-carrier segments, with northbound Saudi crude rerouted from Hormuz an additional boost. Security pressure shifted rather than cleared: Houthi strikes on 8 September hit Jazan-area Saudi energy facilities — the first strike wave on Saudi territory since 9 August and the largest of the conflict (73 injured per the Saudi-led coalition) — with further missile and drone strikes on Khamis Mushait, Abha and Jazan on 9 September per the coalition, and no attack on Red Sea shipping reported since 24 August. Announced cost measure: MSC's Piracy Risk Surcharge (US$55/TEU) and Suez Canal Surcharge (US$36/TEU) apply from 15 September by proforma date on Asia–East Mediterranean/Black Sea trades (carrier advisory; announced, not yet in force at the cut). No SCA forward-dated capacity changes at the data cut; carrier returns remain the swing variable and are decided outside the canal authority. Monitorable, not forecastable.
Update — 11 September. Houthi forces captured the Red Sea port city of Mocha at dawn on 10 September and were reported advancing toward the Hanish Islands (Yemeni government military sources via Reuters; the capture is acknowledged by both belligerents and was cited by the UN envoy at the Security Council; the islands’ status is unresolved and rests on one side’s sourcing). Preliminary same-day ship-tracking showed Bab el-Mandeb crossings falling sharply on 10 September — six by mid-afternoon UAE time against about thirty a day earlier, with almost no inbound movement (Kpler preliminary intraday counts via press; partial-day, revisable, never comparable with this page’s series) — while the Joint Maritime Information Center’s Update 095 (published 10 September) records 112 transits over 6–9 September, all before the capture. Brent rose above US$105. No closure of the strait is reported, no UKMTO or JMIC product had been issued after the capture by this update’s cut, and no post-capture war-risk quotation was available. This update records the event and its attributed terms; direction calls change only at the October edition.
Update — 12 September. Houthi forces reached Perim (Mayun) island inside the Bab el-Mandeb strait on 11 September, and took the mainland coastal town of Dhubab facing it, with two of four Yemeni government sources telling Reuters that government forces had withdrawn from the island (single-side sourcing on the island’s status; no closure of the strait is reported). Saudi Arabia separately shut the East-West pipeline — the overland Hormuz bypass feeding Red Sea loadings at Yanbu — as a stated precautionary measure after drone strikes on pumping stations in the Riyadh and Medina regions on 10 September (Saudi energy ministry via wires; drones attributed by both governments to launches from Iraq; no restart date or export-loss figure published). A pipeline interruption sits upstream of the Yanbu export choice between northbound Suez and southbound Bab el-Mandeb sailings: the sea route and its overland alternative degraded in the same week. Full-day ship-tracking for 10 September — the capture day — showed 26 Bab el-Mandeb transits against a 10-day average near 27 (Kpler via Reuters, preliminary and revisable): the sharp intraday fall recorded in the 11 September update did not persist across the full day. Brent traded above US$107. No UKMTO or JMIC product addressing the island had been issued by this update’s cut. This update records events and attributed terms; direction calls change only at the October edition.
Update — 15 September. The territorial picture consolidated: AP reporting, sourced to both government and Houthi officials, records Perim (Mayun) held and Greater and Lesser Hanish — about 160 km north of the strait — captured, superseding the single-side sourcing and unresolved island status recorded in the updates above. Traffic recovered to its depressed average after a one-day fall: 15 Bab el-Mandeb transits on 11 September (the day Perim was reached), then 24 on Saturday and 27 on Sunday against a 10-day average near 27 (Kpler via Reuters; preliminary and revisable — first prints on this series have so far revised upward) — the level recovered while the security regime beneath it changed. Saudi Arabia’s East-West pipeline repair is estimated at three to five weeks by two regional officials briefed on the damage (AP; partial operation possible, throughput unquantified), against attributed trader estimates of five to seven days of export cover from Yanbu stocks (Reuters) — the overland alternative degrades on a longer clock than the buffer behind it. MSC’s Piracy Risk (US$55/TEU) and Suez Canal (US$36/TEU) surcharges entered application on 15 September by proforma date (carrier advisory; a charging rule, not yet a measured realised cost). Directions change only at the October edition.
Update — 16 September. The bypass terminal itself has now halted: oil loadings at Yanbu are suspended and Saudi Arabia has told European customers that some September-loading crude cargoes will be cancelled (Reuters, trade sources) — a halt arriving on roughly day five of the pipeline shutdown, consistent with the attributed five-to-seven-day stock-cover estimate recorded above. Bab el-Mandeb transits printed 21 on Monday 15 September’s vintage for the 14th, after Sunday’s figure was revised from 27 to 28 in the later print — the upward first-print revision this page’s own caveat anticipates. Dated Brent traded near US$122 a barrel against futures near US$108 — the physical premium is the clearest current price of secured passage. Direction calls change only at the October edition.
Update — 20 September. Later assessments extend the East-West pipeline repair picture recorded on 15 September: Reuters reports satellite analysis and industry sources indicating three damaged pumping stations, with full-capacity repair estimated at five to six weeks, while attributed reports describe a bypass targeting roughly half of pre-attack throughput on a faster horizon (Kpler places even odds on partial recovery of 2–2.5 million barrels per day of exports within about a month). On 19 September the Saudi-led coalition said it intercepted a ballistic missile over Riyadh and thwarted attempted attacks including on Yanbu; the Houthi military spokesman claimed strikes on Aramco facilities there without providing evidence; no damage at Yanbu has been independently established, and the loading suspension recorded on 16 September stands. Italy activated national-command naval escorts for Italian-flag and Italian-owned vessels through Bab el-Mandeb (announced 17 September), declining to wait for EU Aspides transit decisions while remaining within the operation’s architecture; with India’s national tanker escorts and the US facilitation programme in the Strait of Hormuz, naval protection is increasingly organised by flag. The US JMIC advisory of 13 September formally lists Mokha, Dhubab, Perim and the Hanish Islands as Houthi-held — primary-class corroboration of the both-sides record noted on 15 September. Kpler counts printed 21 on Wednesday 16 September and 23 on Thursday 17 September against a 10-day average near 26 (preliminary; Tuesday was revised from 22 to 24). The four-service Gemini return to Suez began on schedule: AIS records Antonia Maersk departing Tanjung Pelepas on 19 September (08:40 UTC), currently at anchor in the Singapore Strait with the westbound ocean leg not yet observed; Marchen Maersk is scheduled for 21 September and Cornelia Maersk from Colombo for 24 September (the carriers’ notices differ on that one date; vessel movements support the 24th), with first eastbound sailings from 22 September and one service pair still unscheduled — both carriers condition the moves on continued Red Sea stability. Drewry’s World Container Index (17 September) rose 1% to USD 4,500 per 40ft while Asia–Europe spot rates fell — Shanghai–Rotterdam down 9% — with Drewry attributing the decline partly to the gradual return of services through Suez and naming renewed Red Sea security risk as the main threat to the restoration pace. Separately, UKMTO recorded a skiff pursuing a westbound tanker 75NM east of Aden (17 September, classified as suspicious activity); an AFP analysis of IMO data (27 August) counts at least fifteen attacks this year in the wider Gulf of Aden–Somalia region, the highest since 2013 — a distinct piracy strand, not part of this gateway’s security regime. Direction calls change only at the October edition.
Update — 23 September. Reuters (22 September, three sources briefed on the matter) reports the East-West pipeline restarted at a low pumping rate, with damage at three of the line’s eleven pumping stations and Aramco seeking to return the rate to the 4 million barrel-per-day reroute level (nameplate capacity 7 million). Full-restoration timing is uncertain and level-unspecified in the sourcing: a security source estimated roughly 40% of capacity within days and a full restart in six to eight weeks, while a separate industry source put a return to full pumping rates at up to six weeks. One China-bound cargo was scheduled to load at Yanbu that day. Bloomberg’s independent reporting the same day describes the system as in the early stages of start-up, running tests, and targeting meaningful flows by 26 September. A reported restart is recorded here as a claim: no loading has been observed — visible Yanbu loadings remain at zero since 16 September — and the suspension recorded on 16 September stands until one is. The US Maritime Administration’s Red Sea / Bab el-Mandeb advisory (2026-006) passed its 22 September expiry with no successor posted and its listing unchanged — a lapse in this advisory line; this page re-checks daily and will record a successor or a formal cancellation when either appears. The Suez Canal Authority confirms the container ship OOCL Portugal (24,000-TEU class) transited the canal southbound on 16 September on a Belgium–China voyage — described by the Authority as the first southbound transit for a COSCO-controlled line since the tensions; tracker data corroborate the canal passage, while her subsequent Bab el-Mandeb passage is not yet observed and remains open. The same release reports container-ship net tonnage through the canal up 54.2% January–August year on year. All four first-wave Gemini vessels now declare Suez routings: Cornelia Maersk departed Colombo on 22 September — two days ahead of the published schedule — with a declared Suez arrival of 30 September; Maastricht Maersk departed Algeciras on 22 September via Tanger Med (declared Suez arrival 27 September); Antonia and Marchen Maersk continue westbound with declared arrivals of 2 October. Declarations are not passages, and each is recorded as such. Bab el-Mandeb crossings printed 26 on both Sunday and Monday (preliminary). Direction calls change only at the October edition.
Update — 24 September. The advisory lapse recorded on 23 September is closed: the US Maritime Administration issued Advisory 2026-013 (Red Sea, Bab el-Mandeb, Gulf of Aden, Arabian Sea and Somali Basin) effective 23 September, expiring 22 March 2027, stating that it “supersedes and cancels U.S. Maritime Advisory 2026-006” — a successor issued one day after the predecessor’s expiry. The new advisory carries the first placement in a US authority document of the reported 24 August Houthi missile strikes on the tankers Amzan and Daisy off Yanbu, and guidance for US-flagged vessels on AIS operation. Visible Yanbu loadings remained at zero at this page’s 24 September re-check; the reported pipeline restart recorded on 23 September stands as a claim. Direction calls change only at the October edition.
Sources for this assessment
Sources: SCA navigation pages and circulars, IMF PortWatch (Suez, Bab el-Mandeb, Cape series), Lloyd's List Intelligence Red Sea Brief (public weekly series), MDS Transmodal container counts (via Kuehne+Nagel), Drewry, Houthi targeting criteria (published document), Al Jazeera and Lloyd's-market press for war-risk levels (press-reported, labelled), marinelink (cancellation charges).
Strait of Hormuz
- How passage is allocated
- Security-constrained — the security situation is the main limit on passage
- Same terms for every ship?
- Identity-conditional (both: in published rules and in observed practice) — access varies by flag, affiliation, ownership or destination
- Since the last edition
- 2 of 6 applicable measures worse — cost of secured passage and access uniformity; 4 stableHeadline reading: 2 of 6 applicable access dimensions deteriorating · observed reading — based on published operational evidence, not private booking outcomes
In brief
≈5% of reference traffic; access via Iranian permits or US-escorted convoys; day-to-day movement unstable — 31 of 31 August days below the July level.
What changed since the last edition
Direction by dimension (6 applicable) — Methodology §4 · what each measure means
Not applicable here, so not counted: nominal capacity and reservable capacity.
- Effective capacity — stable: The full-August mean (4.7/day) is level with the 2.4–4.5/day weekly range the August edition recorded — the severely impaired level persists without material further movement at this data cut; early-September readings belong to the October edition.
- Waiting time — stable: No authority publishes waiting data and no comparable published measure changed; tracker-estimated holding counts are not comparable across providers or months.
- Cost of secured passage — deteriorating (worse): Press-reported premium indications moved from the August edition's 3–10% to 7.5–12.5% of hull per transit (vs ~0.25% pre-conflict), with underwriters reducing capacity or declining cover and marine-war claims past US$2bn across 70+ cases; no post-strike quotation had been published by the data cut.
- Allocation rules — stable: The PGSA permit regime and coalition routing guidance are unchanged, and MARAD's framework advisory was renewed by supersession on 9 September (2026-004 to 2026-011) with guidance continuous — a renewal, not a rule change; the month's attacks and strikes are recorded as security events.
- Access uniformity — deteriorating (worse): The identity criteria hardened since the August edition: the PGSA blacklist (introduced 24 Aug, 45 ships) expanded to 56 on 2 September, and the 5/8 September military-on-listed-tanker strike waves made listed status kinetically consequential on both sides (CENTCOM-stated outcomes).
- Recovery flexibility — stable: No booking system exists and no published recovery rule changed; rerouting via the Cape remains the practical option.
Codes and names in this section: AIS: the position signals ships broadcast · Vintage: the date a data series was retrieved · UKMTO: UK Maritime Trade Operations (Royal Navy) · JMIC: Joint Maritime Information Center · MARAD, MSCI: US Maritime Administration (MSCI: its security advisories) · NAVCENT, NCAGS: US Naval Forces Central Command and its shipping-guidance cell · CENTCOM: US Central Command · PGSA: the Iranian body issuing Hormuz passage permits · IRGC: Iran's Islamic Revolutionary Guard Corps · OFAC: US Treasury sanctions office · IMO: International Maritime Organization; with seven digits, a ship's number · MSC: Mediterranean Shipping Company; Oman MSC: Oman's Maritime Security Centre · LNG, LPG: liquefied natural gas, liquefied petroleum gas · VLCC: very large crude carrier.
Key figures and evidence
Each figure shows its evidence label; open it for the full text.
TransitsDerived
4.7/day mean for August (PortWatch, complete month; daily range 1–10) vs 102 at the June-2023 reference and 78.3 in February 2026, the last full month before the 2026 crisis — ≈5% of reference. AIS counts are a floor: industry estimates reported in press put a majority of residual movement AIS-dark. High-frequency nowcasts are a separate population and vintage-dependent: Kpler visible commodity counts printed 2–9/day over 5–8 September (10-day average 10–12 by vintage; press-reported, preliminary), while JMIC-relayed US NCAGS counts of US-facilitated transits ran near 30/day over 3–5 September — the series are never spliced.
Evidence label: Derived — Computed by WRI from primary figures by a stated method.
Estimated commercial flow (context)Third-party estimate
Kpler's closed-window accounting for the 17 Jun–17 Aug MoU period put total crossings of all liquids and LPG at 8.8M b/d (its crude-and-condensate 'clearance' at 6.1M b/d); a later press-reported Kpler update (31 Aug) put average flow near 8.6M b/d once dark transits and ship-to-ship activity are included, with Kpler calling recent figures floors still filling in. Reconstructed flow estimates do not change the observed-access reading and are never combined with the PortWatch series.
Evidence label: Third-party estimate — An attributed external estimate.
Nominal / reservable capacityPrimary-published
Not applicable — no design capacity is published for a strait and no booking mechanism exists.
Evidence label: Primary-published — The authority's own published figure.
WaitingPress-reported
No formal queue and no authority publishes waiting data; tracker-estimated counts of vessels holding position vary widely with the population counted and are not comparable across providers; the Cape diversion adds 10–14 days per leg.
Evidence label: Press-reported — Reported in press; not published by the authority.
Cost of secured passagePress-reported
War-risk cover at press-reported indications of 7.5–12.5% of hull value per transit (8 Sep; 3–10% at the August edition; ~0.25% pre-conflict), with some underwriters reducing capacity or declining cover; Iranian transit fees reported US$150k–2M. Paying Iran's fee is OFAC-sanctionable and voids Lloyd's war-risk cover — compliance with one gatekeeper breaches the other.
Evidence label: Press-reported — Reported in press; not published by the authority.
Allocation rulesPrimary-published
Access runs through Iran's Persian Gulf Strait Authority (PGSA) case-by-case permits (no reservation product) and parallel US/coalition security routing (convoys coordinated by US Naval Forces Central Command). The permit regime and routing guidance were unchanged at the data cut. MARAD advisory 2026-004, the US framework advisory for the area, was superseded and cancelled on 9 September by advisory 2026-011 (effective 9 September 2026, expires 8 March 2027) — a renewal, not a lapse: the successor keeps the framework in force, describes continuing Iranian threats and strikes on commercial vessels now including missiles, armed UAVs and armed uncrewed surface vessels, and carries updated routing guidance (a 30-nautical-mile standoff from US military vessels, eastbound transits close to the Omani side, UKMTO registration 24 hours before entering the voluntary reporting area).
Evidence label: Primary-published — The authority's own published figure.
Access uniformityPress-reported
Identity-conditional (both): access varies by flag, affiliation, ownership and destination — Iran-linked and PGSA-permitted vessels advantaged; US/Israel/allied-linked and unaffiliated tonnage without crisis-priced cover disadvantaged. The identity gate hardened after the August edition: Iran's Persian Gulf Strait Authority blacklist, introduced 24 August at 45 ships, expanded to 56 (2 September, PGSA website), and September's strikes made listed status kinetically consequential on both sides — US forces struck eight Iranian-linked tankers on 5 and 8 September (CENTCOM statements; disabled or destroyed per CENTCOM), events JMIC records as military-on-listed-tanker actions, not attacks on third-flag merchants.
Evidence label: Press-reported — Reported in press; not published by the authority.
Recovery flexibilityPrimary-published
No booking system exists, so recovery means rerouting — NCAGS guidance and the Cape of Good Hope alternative; several carriers' transit suspensions narrow the options in practice.
Evidence label: Primary-published — The authority's own published figure.
Outlook
Outlook — none. Escalation continued past the cut: CENTCOM stated US forces struck five further Iranian-linked tankers on 8 September after missile fire toward another US warship (eight tankers in four days; CENTCOM-attributed outcomes), and Iran's Supreme National Security Council announced a forthcoming exclusion zone outside the strait — a plan with no published boundaries or enforcement terms, though the IRGC on 9 September claimed to have fired on two US vessels and eight tankers “attempting to cross an area of the Strait of Hormuz that it has declared off-limits” and threatened tankers in Kuwaiti and Bahraini ports (Iranian state statements via Reuters; claims, not verified outcomes) — recorded here as announced risk, not an observed rule change. The exchanges broadened on 9 September: UKMTO issued two attack warnings — a tanker struck by an unknown projectile 28 nautical miles south-east of Al-Faw, and a vessel listing at anchor 24 nautical miles north-west of Port Rashid after a reported strike — and an advisory that several merchant vessels in the Northern Arabian Gulf and Gulf of Oman had been subject to disabling fire amid ongoing military activity (UKMTO Warnings 130/131-26, Advisory 129-26); Reuters described the wave as the largest attack on shipping since the conflict began. Mitsui O.S.K. Lines' CEO said resumption in any form is difficult to see by year-end (Bloomberg, 3 September), and Rystad expects flows to stay very low until November. The freight market prices the workaround: the Baltic Exchange's Gulf of Oman–China VLCC assessment — the crisis-era route created in March for loadings outside the strait — printed a round-voyage time-charter equivalent above US$261,800/day at its 3 September weekly report, with Lloyd's List reporting the 8 September daily assessment at US$358,201/day, up 144% month on month and the highest since the route began (press-reported; Baltic assessments are earnings-equivalents, not fixtures), while Vortexa counts around 40 VLCCs waiting east of Hormuz by late August, the most since the start of 2025, as tonnage is absorbed by the shuttle and ship-to-ship system. A first probe the other way: QatarEnergy's Al Marrouna is transiting with AIS on — the first LNG carrier to do so in about six weeks — bound for Port Qasim, due 10 September (ship-tracking via press). With the June memorandum of understanding lapsed and no new framework announced, the strait remains under discretionary permitting and elevated kinetic risk; the Joint Maritime Information Center (JMIC) expects traffic to remain at reduced levels. Security incidents continued through the data cut — United Kingdom Maritime Trade Operations (UKMTO) Warning 122-26 (tanker struck 29 Aug), US strikes on Larak Island launchers (30 Aug; press-reported), Advisory 123-26 (31 Aug), and Warning 124-26 — two laden VLCCs (Sidr; Senegal Prosperity) struck by projectiles minutes apart late on 31 Aug while transiting outbound — UKMTO's 2 Sep update (Warning 126-26) confirmed two crew fatalities aboard the Sidr, after initial reports of no casualties (vessel and cargo identifications press-reported). Day-to-day movement remains unstable (31 of 31 August days below the July level); whether any improvement is sustained is read against the 14-day persistence rule from this edition onward.
Update — 12 September. Commodity-vessel transits stayed in single digits — seven on 10 September against a 10-day average of fifteen, five entering and two exiting (Kpler via Reuters, preliminary); the same vintage revised 9 September upward from seven to eleven, the third consecutive daily observation revised upward, so first-print counts on this series are floors that firm over several days. One completed passage is recorded on the positive side: the QatarEnergy carrier Al Marrouna exited the strait and delivered a Ras Laffan cargo to Pakistan on 10 September — the first known Qatar-linked LNG shipment since late July (Reuters); a single completion does not establish dependable access. The drone strikes that shut Saudi Arabia’s East-West pipeline on 10 September (see the Suez / Red Sea update) removed, for the duration of the shutdown, the principal overland alternative to this strait. Direction calls change only at the October edition.
Update — 15 September. Strikes on vessels continued: UKMTO Warning 134-26 records a vessel struck by an unknown projectile while transiting the strait at 23:00 UTC on 12 September; Iranian state media report an Iranian container vessel hit near Hengam Island the same night — one crew member dead, four injured, with fire and crew evacuation (timing consistent with the UKMTO report; identity matching is press-based). The Financial Times reports, from US naval coordination centre emails to maritime advisers, that US air-defence protection for tankers narrowed to two daily time slots around the start of September after night attacks increased — an allocation constraint on the escorted corridor, and recent strikes cluster at night. Weekend traffic held in single digits on both days against a 10-day average of 14, with four vessels exiting and ten entering (Kpler via Reuters, preliminary). The Iran–Gulf meeting on the strait scheduled for 14 September in Salalah was postponed (Omani foreign ministry; press reports attribute the postponement to participation questions rather than any single incident). Direction calls change only at the October edition.
Update — 16 September. UKMTO Warning 135-26 (report dated 14 September, issued 15 September) records another vessel struck by an unknown projectile while transiting the strait — no damage reported, the first such no-damage strike in the recent sequence (133-26 → 134-26 → 135-26). Visible transits printed four on Monday 14 September — the lowest daily count in this series to date (first print; preliminary and revisable). Traffic displaced from the Red Sea bypass is moving through this strait instead: with Yanbu loadings suspended, Reuters reports Gulf producers sustaining 7–9 million barrels per day — 30–40% of pre-war volumes — via so-called dark shipments, and Vortexa records Saudi Gulf-side loadings at Ras Tanura/Juaymah of 22 million barrels across 12 vessels in the week of 7–13 September against 6–7 vessels weekly in the prior three weeks. Direction calls change only at the October edition.
Update — 20 September. UKMTO’s incident listing has added three further Attack entries since the 16 September note: Warning 137-26 (17 September, 16NM northeast of Khasab — crew safe), and two 18 September entries not yet carrying public designation numbers — a tanker struck with an onboard fire since extinguished, and a time-late report of a 16 September strike on an outbound tanker (all crews reported safe). The strike sequence since 10 September now runs 133-26 → 134-26 → 135-26 → 137-26 plus the two unnumbered entries. Separately, the IRGC Navy publicly claimed striking the Togo-flagged product tanker Trend for attempting a transit outside Iran’s approved-passage system (statement of 17 September via Iranian state media, which also instructed shipping to disregard US naval guidance); AP could not confirm the report and no UKMTO product names the vessel — an attributed, uncorroborated claim whose significance is its enforcement framing. Iran’s press-reported vessel blacklist has grown from 56 to 57 (Riviera Maritime, via press). The US JMIC advisory of 13 September recorded about 70 US-facilitated transits over 10–12 September and defines its counting populations — facilitated movements versus visible cargo vessels over 1,000 dwt — a third counting basis beside the Kpler and PortWatch series; none are spliced. Kpler daily counts continued to revise upward: Monday 14 September’s first print of four was revised to seven, Tuesday’s four to twelve, and Wednesday’s three to six — fifteen of sixteen observation-days have now revised upward, and no daily count below four has survived seasoning; Thursday 17 September printed four (first print, preliminary) against a 10-day average near sixteen. On cost: Maersk’s operational update 48 (17 September) published the first carrier tariff schedule for secured Gulf passage — emergency freight of USD 1,800 / 3,000 / 3,800 per 20ft / 40ft / reefer container across Gulf destinations, plus USD 1,000 per container for any Hormuz transit, stated to cover insurance premiums and crew-risk compensation and replacing the prior landbridge charges. Press-reported VLCC spot assessments have moved above USD 500,000/day (from about USD 132,000 before the war — Allied Shipbroking via Reuters, a broker estimate), and Kpler estimates a freight premium of roughly USD 10 per barrel for loading inside the Gulf versus the Gulf of Oman, with Fujairah and Sohar transfer capacity described as at or near its limit. Reuters (18 September, trade sources) reports about 60 million barrels sold for September–October loading from Ras Tanura via ship-to-ship transfer at Sohar — roughly 1–1.5 million barrels per day, similar to or slightly higher than August; the Petroleum Association of Japan states on the record that in some cases oil crosses the strait at Saudi risk before transfer outside the Gulf. Sales are not deliveries, and the first leg still crosses this strait. Direction calls change only at the October edition.
Update — 21 September. Scope note on the 16 September entry’s dark-shipment figure, following an internal review flag: Reuters’ wire of 15–16 September attaches 30–40% of pre-war volumes to the 7–9 million barrels per day it reports Gulf producers exporting via so-called dark shipments — the agency’s own wording, relayed here unchanged. Reuters’ separate data analysis of 9 September carries a broader accounting: Goldman Sachs putting total Gulf exports, including dark crossings, at 15–16 million barrels per day — roughly two-thirds of pre-war — with a 35% figure applying to refined products only, and Vortexa’s seven-day strait average near 8 million. The two items measure different populations — dark-enabled export volumes against total Gulf flows — and are not spliced here; the 16 September sentence stands as published, with this note recording the distinction. Direction calls change only at the October edition.
Update — 23 September. UKMTO added two attack warnings on 21 September: 140-26 — an inbound tanker struck by an unknown projectile, two crew members with minor injuries, continuing under her own power — and 141-26, an outbound LPG carrier hit by debris from unknown projectiles, crew safe (a Master-sourced, time-late report). Press reporting (Marisks, a Greek maritime-risk firm, via Reuters) identifies the vessels as the crude tanker LR Stephanie (struck 21 September, entering) and the LPG carrier Al Maryah (incident 20 September); the names are not carried by UKMTO’s own products, and report dates and incident dates are recorded separately. That makes five attack-classified strait incidents by incident date over 16–21 September (139-26; 137-26 — the Trend, whose identity the coalition’s JMIC has since corroborated; 138-26 — the STI Steadfast; 140-26; 141-26). No actor has claimed the strikes; attribution framing rests with JMIC, not UKMTO. Visible transits printed two on Monday 21 September — both inbound bulk carriers, with no outbound movement visible (first print, preliminary; the same reporting shows LR Stephanie entering that day, so the visible count is a floor, not an exhaustive record). Sunday 20 September’s count has now been revised 6 → 7 → 10 across three successive vintages. Tanker tracking put Sunday’s Gulf-terminal loadings at 12–14 million barrels across six to seven supertankers (TankerTrackers.com via Reuters, satellite-corroborated; MarineTraffic counts the lower figure — the range is retained rather than either point). Loadings, strait transits and ship-to-ship volumes overlap — the same barrels can appear in each series, and they are never summed here. Kpler’s own analysis puts Gulf-of-Oman ship-to-ship volumes at a record 7.2 million barrels per day so far in September (0.16 million before the war), with Kpler’s caveat that repeated transfers double-count against strait transits. Direction calls change only at the October edition.
Update — 24 September. UKMTO Warning 142-26 (report time 06:30 UTC, 23 September) records an attack in the strait off the Musandam peninsula: a cargo vessel struck by an unknown projectile, on fire and adrift, all crew evacuated with — in UKMTO’s own wording — “2 casualties reported”. Oman’s Maritime Security Centre identifies the vessel as the bulk carrier Cape Dao (Antigua and Barbuda flag) and states the Royal Navy of Oman evacuated 27 crew, with an engine-room fire, about 2.5 nautical miles off Musandam Governorate; UKMTO’s warning does not name the vessel. The Embassy of India in Muscat confirms the loss of one Indian national among 19 Indian crew aboard — the first fatality among the attack-classified strait incidents in the sequence this page tracks (133-26 onward). Crew figures differ across holders — 19 Indian nationals (embassy), 27 evacuated (Oman MSC), “all crew … 2 casualties” (UKMTO) — and are recorded per holder rather than reconciled. No actor has claimed the strike. The vessel’s status is open: the last authoritative state is on fire and adrift, with no towage or salvage confirmation as of 24 September; this page re-checks daily. The IMO’s count now stands at 84 confirmed incidents and 23 confirmed seafarer fatalities as at 23 September — its listed entries run through 21 September and do not yet include the Cape Dao, so the two records are not summed here. Separately, on the outlook strand only: the United States and Iran completed a round of indirect, mediated talks in New York on 22 September (Special Envoy Witkoff and Jared Kushner on the US side, Foreign Minister Araghchi for Iran; Iranian officials state the sides did not meet face-to-face, with mediators shuttling between them), with reopening of this strait on the agenda and Iran’s conditions and seven-day reopening timeline restated. Both principals characterised the round positively on the record; the same day, President Trump’s UN address coupled openness to an agreement with a threat to “annihilate” Iran absent one, placing an expected agreement after the November midterms. A completed round is a stage change from the offer-and-rebuff position recorded on 23 September; it changes no reading. Direction calls change only at the October edition.
Sources for this assessment
Sources: IMF PortWatch, UKMTO/JMIC warnings and advisories, MARAD MSCI 2026-004/2026-011, IEA, Kpler (via its Insight blog and press, labelled), The National and press-reported premia, Maritime Executive (PGSA), Baltic Exchange weekly tanker report and Lloyd's List (freight assessments, press-reported), Vortexa (via Breakwave Advisors), Reuters.
Records and transparency
Transparency scorecard
Who publishes what
| Gateway | Capacity | Transits | Booking/slots | Waiting | Priority price | Rules |
|---|---|---|---|---|---|---|
| Panama (ACP) | Stated | Monthly PDF; daily report | Offered vs used, by class | CWT monthly; queue and CWT daily | Volumes + registered bid distribution; prices press/ | Published advisories |
| Suez (SCA) | Stated | Quarterly/ | No product | Not published | n/ | Circulars |
| Hormuz | n/ | AIS only | Opaque permits | Not published | Press-reported | Unpublished/ |
| Hub ports | — | AIS port calls | Contractual, private | Rotterdam only | — | — |
About this monitor
The Gateway Access Monitor applies WRI’s Logistics Access Reliability framework, which distinguishes the capacity infrastructure was designed for, the capacity present conditions permit, the capacity users can actually book, and whether booked capacity is delivered at a predictable time and cost. Each chokepoint is assessed monthly across eight dimensions — nominal, effective and reservable capacity; waiting time; cost of secured passage; allocation rules; access uniformity; and recovery flexibility — under a fixed allocation-regime taxonomy (regime tags re-labelled under Methodology v1.0 carry no change in how passage is allocated), combining AIS-derived transit data (IMF PortWatch, daily) with the operating authorities’ primary publications. Full definitions and terms: the Gateway Access Monitor methodology (v1.0). Every figure is checked against its cited source before publication and carries an evidence label (primary-published, derived, third-party estimate, WRI floor or range, or press-reported). Access uniformity is shown with its basis — published rules, observed practice, or both. Direction counts movement since the previous edition; the severity of access is read from the level against its reference, the access state and the stability columns — a gateway can be stable at a severely impaired level. Readings are observational — based on published operational evidence, not private booking outcomes. The Gateway Access Monitor is a companion series to the Logistics Growth Index (LGI) and does not enter the computation of any LGI reading.
The World Research Institute (WRI) — the intelligence and research arm of the World Certification Institute (WCI) — publishes the monthly Logistics Growth Index (LGI). Its World and regional readings are published openly at intelligence.worldresearch.org/lgi. Updated with each monthly edition. Media: media@worldresearch.org.