Iran's Hormuz Blacklist Doubles: Supplier Checks

Iran's Persian Gulf Strait Authority has almost doubled its non-compliance list to 240 ships and confirmed that all Sinokor vessels will be treated like blacklisted tonnage, according to Seatrade Maritime News (2 November 2026). For a chandler, bunker supplier or port agent working Gulf ports, that turns a sanctions question into a quoting question.

What changed in the Strait of Hormuz

The PGSA (Persian Gulf Strait Authority, the Iranian body that administers its own rules for Hormuz transits) widened its non-compliance list from roughly 120 to 240 ships. Kuwait Oil Tanker Company fleets and the Sinokor fleet are named in the same report.

This sits inside a wider squeeze. The White House says its blockade of Iran's energy shipping has been 100 percent effective, and The Maritime Executive (3 November 2026) reports that the numbers largely support the claim. An earlier assessment in the same publication described the blockade as deepening and widening (The Maritime Executive, 23 October 2026).

Iran still moves some cargo. gCaptain (16 October 2026) reported that Iran has managed to export some LPG and jet fuel since July despite the blockade.

Why two lists matter more than one

A vessel can now be exposed to two separate authorities with different criteria. The US blockade targets Iranian ships and ports; the Iranian list targets ships it deems non-compliant with its own transit rules.

That produces a middle group: tonnage that is legal for one side and flagged by the other. Peer-reviewed work on the same problem describes the mechanism. A 2026 paper in Humanities and Social Sciences Communications found that shadow fleets engage in systematic violations including AIS manipulation, illicit ship-to-ship transfers and the operation of aging, poorly maintained vessels, and that the IMO's response remains reactive and fragmented (Palgrave Macmillan).

A second 2026 paper in Lex Portus argues that flag-state enforcement of administrative penalties against dark fleet vessels is structurally weak under UNCLOS monitoring obligations (Lex Portus). In practice, the supplier carries more of the screening burden than the flag registry does.

What it means commercially for maritime service providers

The commercial effect is not a shortage of enquiries. It is a change in which enquiries a supplier can accept, and at what price.

• Ship chandlers: a 240-ship list means more owners asking for stores at short notice with unusual payment routes. Cash-and-carry terms, or a bank guarantee, become the default for first stems from unfamiliar managers.
• Bunker suppliers: a stem for a listed vessel ties up barge time and credit. A stem (a confirmed order for a specific quantity and grade of bunkers on a given date) fixed against a vessel that cannot safely complete the port call is a loss on both counts.
• Port agents: the PDA (pro forma disbursement account, the estimate of port costs sent to the owner before the call) needs a war-risk and screening line. Agents who absorb that cost silently lose margin on every Hormuz call.
• Repair yards and marine service companies: attendance on a listed vessel may need permits, and a superintendent may not travel. Mobilisation cost rises before any work is quoted.

The pricing side of this is covered in more detail in pricing Gulf port call work under Hormuz risk, and the freight side in where Hormuz tanker freight work lands.

A screening routine before you quote

Run the same five checks on every Gulf enquiry, in this order, and record the result in the file.

1. Identify the vessel properly. Use the IMO number (the permanent seven-digit hull identifier that does not change with the ship's name or flag) rather than the name alone.
2. Check the current lists. Screen against both the US measures and the PGSA non-compliance list, and note the date you checked.
3. Confirm who is buying. Establish whether the counterparty is the owner, the technical manager or a trader. A commercial trader with no DOC holder (the company holding the Document of Compliance under which the ship is operated) relationship is a different credit decision.
4. Price the risk explicitly. Quote the screening and attendance cost as a line, not inside a lump sum.
5. Set the payment condition. For unfamiliar counterparties, ask for payment before delivery or a guarantee, and say so in the quotation.

None of this is new legal work. It is the same discipline that vessel vetting already asks of suppliers, applied to a list that now changes faster.

Where the next wave of enquiries comes from

Two other stories this week point the same way. Hellenic Shipping News (2 November 2026) reports that tanker freight in Asia has stayed buoyant into November, with a tanker pile-up at ports curtailing tonnage supply in South East Asia and India. Congestion plus rerouting means more vessels waiting, and waiting ships buy water, provisions and lubricants.

The same outlet's dry bulk analysis notes India's draft National Steel Policy targeting 531 million tonnes of crude steel production by 2047 (Hellenic Shipping News, 2 November 2026). Longer-term iron ore and coking coal flows through Indian ports widen the base of vessels a Gulf or Indian Ocean supplier can serve outside the sanctioned segment.

The practical conclusion for a sales team is to work both ends. Keep a compliant book that grows with legitimate cargo, and treat the listed tonnage as a credit and compliance decision rather than a sales target.

How VesselReach helps

Screening decisions are only useful if your team reaches the right counterparty before the vessel sails. VesselReach turns vessel movements at your chosen ports into conversations with the people who decide.

• Vessel intelligence: see vessels near your ports and expected arrivals, which means your team can qualify a Gulf enquiry days before the ETA rather than after the agent calls.
• AI company targeting and decision-maker discovery: VesselReach identifies the company behind each vessel and finds operations, chartering, procurement and fleet contacts by role, which means you screen the buyer and the vessel in the same step.
• Email, WhatsApp and phone outreach with AI enquiry handling: enquiries are answered from your approved information and escalated to a human when the answer is not verified, which means compliance-sensitive questions reach a person, not a guess.

Book a VesselReach demo to run the workflow on your own ports, with a 10-day free trial offered after the meeting.