VIGIL CONSILIUM
Context. Not headlines.
Coverage · Iran–Gulf

Strategic system · partial record

Maritime access

The straits and approaches a Gulf cargo must pass — Hormuz, the Gulf of Oman, Bab el-Mandeb — and the Red Sea ports beside them, read as access: whether a loaded ship can sail.

8 published markers 4 supply systems

Assessed as of
2026-10-21
Last reviewed
2026-10-29

AssessmentHigh confidence

Context, not targeting. A system record names published markers and published operators and states dependencies at the level a published institution does. It carries no facility-level capacity, vulnerability, protection or repair detail; the schema has no field for any of it.

123Open the module map
Locator — land outline from Natural Earth 110m (public domain); 8 places this record names, at the coordinates the module already publishes. No routes, boundaries, control or activity are drawn.

What this system is

Hormuz is the only outlet of the enclosed sea every core state but Oman loads into, and Bab el-Mandeb is the gate of the Red Sea route the bypass pipelines reach. The module reads both through what stopped traffic in practice — war-risk cover and attribution — not through naval posture.

The access layer under the energy system: the energy system decides what can be loaded, this system decides whether it can sail, and the two are kept apart because cover and attribution move on a different clock from capacity.

Confidence: High As of 2026-10-21Reviewed 2026-10-29

The system

Overview
Two straits bound the system. Hormuz is the only outlet of the Gulf, and the commercial-closure chain records that the mechanism which stopped traffic in 2026 was marine war-risk cover rather than any physical block. Bab el-Mandeb is the gate of the Red Sea route that the Saudi East–West system and the Yanbu terminal reach, and the Red Sea rerouting chain records what shipping does when it is contested: the Yemeni ports of Hodeidah and Mokha and Perim island are the markers the module publishes for that approach. Bandar Abbas is Iran's principal commercial port on the northern shore.
Current state · as of 2026-10-21
As the crude-export record last assessed it (22 September 2026), commercial access through Hormuz turns on war-risk cover and the Makkah mechanism the module's Watch questions follow; the Red Sea approach is read through the rerouting and stranded-seafarer chains. No naval posture is stated here. In September 2026 Kpler put Gulf crude exports excluding Iran back at the pre-war level by a changed route: shuttle tankers and transfers off Sohar and Fujairah, with the rest from Fujairah and the Red Sea. That is volume moved without the strait reopening commercially, and six tankers were struck in it between 28 September and 2 October (crude-export record, 4 October). In October the strikes spread and the claims began: the Revolutionary Guard claimed a tanker for an "unauthorised route" on 9 October and stated a reach beyond the strait, Central Command declared the lanes open to ships not breaking its sanctions, a struck container ship sank on 14 October, and UKMTO counted combined transits about 70 per cent below pre-conflict levels in the weeks to 14 and 21 October. No cover was found written and no navigation régime agreed in any review to 25 October.
Commodities and outputs
Marine war-risk insurance

Nodes

The published markers that carry this system value, by the module’s own priority. A note is the system record’s; a marker without one is a member by its own tag.

Routes and operators

Supply systems running through it

  • Hormuz-dependent crude and products export systemMineral export · 8 nodes · 6 documented disruptions · named by the recordThe system through which six of the seven core Gulf states send their oil to market, converging on one strait.
  • Iranian crude export systemMineral export · 4 nodes · 4 documented disruptions · joined by its nodesA single terminal inside the strait, and a bypass that was built and has barely been used.
  • Qatari LNG export systemGas & LNG · 3 nodes · 4 documented disruptions · joined by its nodesThe cleanest dependency in the module: close to a fifth of world LNG, one complex, one strait, and no alternative of any size.
  • Saudi east–west crude transitMineral export · 4 nodes · 8 documented disruptions · joined by its nodesThe largest Hormuz alternative in existence, limited by its terminal rather than by its pipeline, and opening onto a second contested strait.

Dependencies and constraints

Each marked documented (a published source states it) or assessed (Vigil infers it and says so). The two are never drawn the same way.

Depends onDocumented Confidence: High

Marine war-risk cover. Cover, not capacity, decided whether loaded tankers sailed in 2026; the commercial-closure chain documents the mechanism.

Sources: Public market and insurance data · Reuters↗

Recent structural changes

2026-10-09Constraint Confidence: Moderate

The Revolutionary Guard claimed a tanker strike for an "unauthorised route" and said action against "violating" vessels would no longer be limited to the strait; the same day Central Command declared the main lanes open to vessels not violating United States sanctions. Two unilateral conditions on passage, neither accepted by the other side or by the riparians, and neither a régime.

EventThe Revolutionary Guard claims a tanker strike for an “unauthorised route”, as Central Command declares the lanes openMapStrait of Hormuz

Sources: Official government statements · UK Maritime Trade Operations and Joint Maritime Information Center advisories↗ · Established international media reporting

Transmission chains through this system

Each step carries its own basis grade — Confirmed, Plausible exposure, Unconfirmed scenario — and a chain can only weaken from left to right.

Watch questions bearing on it

Events at its nodes

13 – 17 Oct 2026A container ship struck in the strait sinks, and the attacks reach the Saudi Gulf coast5 – 10 Oct 2026The Revolutionary Guard claims a tanker strike for an “unauthorised route”, as Central Command declares the lanes open4 – 10 Oct 2026Yemen's government and the Saudi-led coalition open an offensive for the Houthi-held coast and SanaaSep 2026; established in reporting 17 – 18 SepSaudi crude goes back through the strait the pipeline was built to avoid13 – 16 Sep 2026The Hormuz navigation table is set, and does not sit10 – 11 Sep 2026The Houthi movement takes the southern Red Sea coast and reaches Bab el-Mandeb1 – 2 Sep 2026United States and Iranian exchange of strikes11 Aug 2026The IMO records 65 incidents and 17 seafarer fatalities30 Jul 2026A Saudi-led multinational maritime defence alliance is declared in RiyadhJul 2026The Houthi movement blockades shipping to and from Saudi ports7 Jul 2026The United States President declares the memorandum overMay – Jun 2026Gulf production shut-ins reach their peak

Economic exposures it underlies

ExposureHormuz transit & bypass capacityExposureMarine war-risk insurance

Analytical Notes

NoteThe strait that closed without being blocked

Actors and arrangements

ProfileIran and the GulfProfileSaudi ArabiaRelationshipA declared adversarial relationship standing since 1980, in open armed conflict since 28 February 2026.RelationshipEstablished in 1971 and never interrupted — the most durable Iran channel in the Gulf.RelationshipBahrain hosts the United States Navy's Fifth Fleet and the Combined Maritime Forces under a long-standing bilateral arrangement.RelationshipA dispute over Abu Musa and the Greater and Lesser Tunbs, standing since 1971.RelationshipA long-standing armed adversarial relationship that became a maritime one in July 2026.

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Sensitivity: public-contextual Confidence: High Sources: Congressional Research Service — Iran, the Gulf and the Strait of Hormuz · Public market and insurance data · Reuters↗ · Established international media reporting · UK Maritime Trade Operations and Joint Maritime Information Center advisories↗ · Official government statements · Al Jazeera English↗ Methodology Corrections

Assessed as of — 2026-10-21 Last reviewed — 2026-10-29