Maritime sanctions compliance

Maritime sanctions are legal restrictions imposed by national and international authorities that prohibit or limit trade, financial services, and transport involving designated countries, entities, or individuals. For Masters and Company Security Officers (CSOs), sanctions compliance is not just a legal formality — a single unlawful voyage can result in vessel detention, loss of P&I cover, de-listing from classification, and criminal prosecution. This page summarises the four major regimes, their lists, current country-specific exposure, and the practical steps shipping companies must take.

Caveat: Sanctions regimes change frequently — designations are added and removed, General Licences expire, and new regulations enter into force. The information below was accurate as of mid-2025 and is provided for orientation only. Always check current official lists (OFAC SDN, EU Consolidated List, UK Consolidated List, UN Consolidated List) and seek legal advice before operating in high-risk jurisdictions.

The four major regimes

UN Security CouncilUnited Nations — UNSC
List: UN Consolidated Sanctions List
Binding on all UN Member States. Sanctions committees administer asset freezes and travel bans. Maritime-relevant regimes include North Korea (DPRK) — UNSCR 2270 et seq., prohibiting ship-to-ship transfers of prohibited cargo — and Somalia. The UN Panel of Experts publishes annual reports exposing sanctions evasion methodologies.
OFAC (US)Office of Foreign Assets Control, US Treasury
List: Specially Designated Nationals (SDN) List; Sectoral Sanctions Identifications (SSI) List; Non-SDN Iran Sanctions Act (NS-ISA) List
Extraterritorial reach: any transaction touching US persons, US dollars, or US correspondent banks triggers OFAC jurisdiction regardless of where the ship is flagged. Secondary sanctions risk: non-US companies that do business with SDN-designated entities can themselves be designated. OFAC issues General Licences for humanitarian exceptions and industry-specific guidance. The May 2020 OFAC Maritime Advisory (updated 2023) lists specific evasion tactics.
OFSI (UK)Office of Financial Sanctions Implementation, HM Treasury
List: UK Consolidated List
Since Brexit, the UK maintains its own sanctions regime independent of the EU, though the lists largely overlap. OFSI can impose civil penalties up to the greater of £1 million or 50% of the funds involved. The UK Global Anti-Corruption sanctions and UK Russia (Sanctions) (EU Exit) Regulations 2019 are the key instruments for shipping.
EU sanctionsEuropean Council / European Commission
List: EU Consolidated List of persons, groups, and entities subject to EU financial sanctions
EU sanctions regulations apply to all EU-incorporated entities, EU nationals, and any activity taking place within EU territory. The EU has adopted 14+ packages of Russia sanctions since February 2022, covering crude oil, petroleum products, price cap service provision, and ship-to-ship transfer. EU law requires competent authority authorisation before engaging with listed entities.

What must be screened

A CSO and the ship's operator must screen all parties and activities associated with a fixture or voyage, not just the named charterer. The screening perimeter should include:

Counterparties: shipowner, disponent owner, charterer, sub-charterer, shipper, consignee, notify party, cargo receiver, port agent.
Beneficial owners: Ultimate Beneficial Owners (UBOs) of each corporate entity, identified through company registries and KYC (Know Your Customer) documentation.
Cargo origin and destination: The commodity (crude, petroleum products, fertiliser, steel, timber) and its country of origin, not just its stated loading port.
Ports of call and anchorages: Including bunkering stops; some ports (e.g., Bandar Abbas, Iran) trigger automatic OFAC flags. Intermediate ports used for cargo transhipment require scrutiny.
Ship-to-ship transfer counterparties: The identity and ownership of the vessel conducting the STS operation, its flag, and the declared purpose of the transfer.
Financial institutions: Banks used for freight payments must not be sanctioned; US dollar clearing always routes through US correspondent banks.

Country-specific snapshots

The following is an orientation summary only. Regimes evolve; always verify current lists.

IranOFAC, EU, UK, UN
Comprehensive US sanctions under ITSR (Iranian Transactions and Sanctions Regulations). Key risks: AIS manipulation (going dark), falsified cargo manifests, ship-to-ship transfers off Fujairah / Kharg Island, use of non-G7 flags. EU suspended most sanctions post-JCPOA but US secondary sanctions remain fully active. Iranian crude oil is almost entirely sold through an opaque network of front companies and flag-of-convenience vessels.
North Korea (DPRK)UN, OFAC, EU, UK
Among the strictest UN regimes. UNSC resolutions cap coal, iron, lead, fisheries, and petroleum imports/exports. Ship-to-ship transfers are specifically prohibited. DPRK vessels routinely disable AIS. Many DPRK cargo movements use third-country flag states; the UN PoE has documented over 100 vessels involved in coal smuggling.
RussiaEU, OFAC, OFSI, G7 price cap
Post-February 2022: EU, UK, US, and G7 have sanctioned Russian individuals, banks, and certain shipping companies. Key maritime measures include the G7 oil price cap (see related page), bans on providing maritime services for Russian oil above the cap, and prohibitions on carrying Russian-origin crude. Novatek and specific LNG projects are subject to separate restrictions.
BelarusEU, OFAC, OFSI
Potash fertiliser exports are a key sanctions target. Several Belarusian state entities involved in rail and logistics are designated; cross-border cargo movements via Belarus require careful screening.
SyriaEU, OFAC, OFSI, UN
Comprehensive embargo on Syrian-government-linked entities. Syrian ports (Latakia, Tartus) are associated with sanctioned vessel calls. Tartus hosts a Russian naval base; vessel calls require careful pre-voyage screening.
CubaOFAC (US-specific)
Cuban Assets Control Regulations (CACR). Primary sanctions restrict US persons and companies; Cuban-origin goods cannot transit the US. Secondary sanctions risk for non-US entities is lower than Iran/DPRK, but US dollar clearing exposure applies.
VenezuelaOFAC, EU
PDVSA (Venezuelan state oil company) is designated by OFAC. Crude oil liftings from Venezuelan ports risk SDN exposure. OFAC has issued General Licences with expiry dates for limited humanitarian cargo; charterers must check current GL status.
MyanmarOFAC, EU, OFSI
Post-2021 coup sanctions target the Myanmar military (Tatmadaw) and state-owned enterprises, including Myanmar Oil and Gas Enterprise (MOGE). Timber and gemstone trade restrictions are also in force.

The dark / shadow fleet

The "dark fleet" refers to an estimated 500–1,000 vessels (depending on the definition used) that carry sanctioned oil outside G7 insurance and financial systems. These vessels use a range of evasion techniques:

AIS manipulation
Vessel turns off AIS transponder or transmits false position data. OFAC flags persistent AIS gaps as a red-flag indicator, particularly in waters near Iran, Venezuela, and North Korea.
Flag-hopping
Vessel changes flag state rapidly — often from recognised registries to low-scrutiny open registries — to avoid detention or blacklisting. Some vessels have changed flag 4–5 times in a year.
Ship-to-ship (STS) transfers in high-risk anchorages
STS operations off Ceuta, Fujairah, Larak Island, Kalamata (Greece), and in the South China Sea are documented methods for obscuring cargo origin. MARPOL Annex I Ch 8 requires pre-notification; illicit STS operations often skip this.
False cargo documentation
Bills of lading showing origin as a third country (e.g., 'Malaysian crude') when the underlying origin is sanctioned. Traders use multiple intermediaries to create a paper trail separating cargo from its origin.
Opaque beneficial ownership
Use of shell companies, nominee directors, and jurisdictions with weak UBO (Ultimate Beneficial Owner) disclosure to conceal sanctioned entities. OFAC recommends screening ultimate beneficial owners, not just the named charterer.

Practical compliance: pre-fixture and voyage

Pre-fixture screening — Before fixing, screen all counterparties against current sanctions lists. Use a recognised compliance platform (e.g., Pole Star, Navigate Response, Windward, MarineTraffic Intelligence) or dedicated legal counsel. Document the search results and retain records.
Voyage screening — Review the proposed voyage route for sanctioned port calls, high-risk anchorages, and intended STS operations. Request AIS history for the vessel and any receiving vessel in an STS fixture.
Deviation and refusal — If the Master identifies a sanctions-related risk mid-voyage (e.g., orders to proceed to a sanctioned port, cargo origin misrepresentation discovered), the Master has a right and duty to report to the company and, if necessary, to deviate. Most charter parties include a sanctions clause entitling owners to refuse illegal orders without liability.
Ongoing monitoring — Sanctions designations can change after fixture. Subscribe to automated list update notifications (OFAC updates the SDN list without advance notice). Re-screen at key voyage milestones: before loading, before STS, before entering a port.

Documentation and KYC

KYC files — Maintain a KYC file per voyage containing: entity searches, UBO declarations, charter party, cargo manifests, and screening timestamps. OFAC recommends a minimum 5-year retention period.
AIS transmission policy — Operators should maintain a written policy requiring continuous AIS transmission and documenting any legitimate reason for AIS interruption (port authority instruction, piracy avoidance — documented in the Official Log).
BIMCO sanctions clauses — The BIMCO 2020 Sanctions Clause for Time Charter Parties and the BIMCO 2020 Sanctions Clause for Voyage Charter Parties give owners the right to refuse orders that would expose the vessel, crew, or owner to sanctions, and to terminate the charter with reimbursement of repositioning costs.

Industry advisories

OFAC Maritime Advisory (May 2020, updated 2023) — Sets out 13 red-flag indicators of sanctions evasion and recommends vessel owners, operators, flag states, and port operators adopt enhanced due diligence. Available on the OFAC website.
G7 / EU / UK industry guidance (2022–2024) — Multiple joint advisories from G7 governments directed at the shipping, insurance, and banking sectors, specifically addressing Russian oil price cap compliance and the dark fleet.
IMO MSC-FAL.1/Circ.3 — IMO guidance on maritime cyber risk management that also touches on AIS integrity — relevant because AIS spoofing is both a cyber and a sanctions-evasion tool.

Liability and insurance

Secondary sanctions risk — Non-US companies that conduct business with OFAC-designated entities can themselves be designated and lose access to US dollar clearing — effectively cutting them off from global trade finance.
P&I cover exclusion — All 13 International Group P&I Clubs exclude cover for voyages or activities involving sanctioned entities or jurisdictions. The standard IG Club sanction clause (similar to the "5.1 typhoon clause" structure) suspends cover automatically if the vessel becomes involved in a sanctioned activity. Claims arising from such voyages will not be covered.
Banking corridor risk — Freight payments in US dollars route through US correspondent banks, which conduct OFAC screening on all transactions. If a transaction is flagged, the bank can block the payment, file a Suspicious Activity Report, and notify OFAC. This can trigger an OFAC investigation even if the vessel operator was unaware of a sanctions connection.

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