Iran Designates 46 Vessels as Non-Compliant in the Strait of Hormuz
23 Aug 2026
Key judgement
Trident assesses the designation may identify an established target set rather than simply an administrative enforcement list.
Iran has published a list of 46 vessels it says may face fines, detention, seizure or confiscation on future Strait of Hormuz transits. Several listed vessels had already been struck before publication.
Situation
On 23 August, Iran's Persian Gulf Strait Authority (PGSA) published a Non-Compliant Vessels (NCV) list naming 46 vessels, and stated that vessels breaching its Strait of Hormuz arrangements will face fines, detention or seizure, and confiscation on future transits. It directed cargo owners to review the list before fixing. The PGSA gives no criterion for inclusion, appeal mechanism or removal process, and the list should be assumed to change without notice. Standing threat ratings for the Strait and the Persian Gulf are unchanged.
What has changed
The list names 46 vessels with IMO numbers and should be screened by IMO number, not vessel name. UKMTO reported 56 vessel-damage incidents in the Strait and adjacent waters between 28 February and mid-August, with transit volumes at roughly 17 per cent of the pre-conflict average. Several vessels subsequently named on the list have already been struck, including in the UAV attacks of 8 and 13–14 August; the UAE attributed the August attacks to Iran, which UKMTO and CENTCOM had not confirmed at the time of reporting.
Operational relevance
Because several listed vessels had already been attacked, the designation is not only an administrative matter. Owners, charterers and managers should screen fleets and forward Gulf fixtures against the list, notify flag state, P&I and war-risk underwriters, and review war-risk cover before committing to a transit. A vessel associated with a listed vessel by ownership, management or charter should assume that association may be sufficient for inclusion, and treat further designations as probable in the short term.
Trident assessment
The list names vessels already under attack, and its composition — weighted towards UAE state-linked tonnage, including a contiguous 90746xx IMO block, alongside Greek-managed and Indian-linked tonnage, with gas carriers well represented — indicates selection against specific national interests rather than procedural enforcement. There is no compliant route off the list: removal requires contacting the PGSA directly, a body designated by OFAC on 27 May 2026, which OFAC assesses may constitute support to the IRGC. Approaching the PGSA is therefore a legal and sanctions decision, not an operational one. Nothing here is legal, sanctions, insurance or financial advice.
Who should review this advisory
- Shipowners
- Charterers
- Managers
- War-risk insurers
- P&I clubs
- Cargo interests
- Legal and sanctions teams
- Marine security teams
What to watch
Over the next seven days Trident judges extension of the list to further vessels highly likely, and enforcement action against at least one listed vessel, and a kinetic attack on listed or UAE state-linked tonnage in the Strait or its approaches, likely. Action against an unlisted vessel through association or misidentification is a realistic possibility; withdrawal or suspension of the mechanism by Iran is unlikely.
What the full advisory contains
- The complete 46-vessel list with IMO numbers (Annex A)
- Trident's assessment of the designation and target set
- A seven-day outlook
- Sanctions considerations around the PGSA
- Operational guidance for a Strait of Hormuz transit
- Transit-support considerations
Related analysis
Maritime Intelligence · 19 August 2026
Strait of Hormuz Transit Fees & Sanctions Exposure
Read the analysisSource
PGSA publication and open-source reporting · 23 August 2026
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