How a ship gets sanctioned: OFAC, the UK and the EU compared

Three regimes, three routes to the same hull

A tanker can end up on three lists in the same year and be treated differently by each. The instruments are not equivalents of one another; they are separate legal mechanisms that happen to name the same steel.

The United States: blocking a property interest

OFAC administers sanctions programs created by executive orders and statutes. For vessels, the two routes are direct designation of the ship, and identification of the ship as blocked property of a person already designated.

The practical sequence looks like this. Treasury announces an action, usually with a press release explaining the policy reasoning and naming the targets. The same day, a Recent Actions notice lists every addition and removal in the precise format of the list: name, call sign, vessel type, flag, tonnage, the identifier line reading “Vessel Registration Identification IMO” followed by seven digits, the program tag in square brackets, and often “(Linked To:” and the designated owner. The SDN List file is then updated.

The effect is a blocking sanction. Property and interests in property of the designated person that come within US jurisdiction are blocked, and US persons are broadly prohibited from transacting with them. Several programs also carry secondary-sanctions exposure, which is why non-US banks, insurers and port agents often decline listed vessels regardless of where they sit.

One quirk matters for anyone reading the raw data: the SDN file records the designation date but not the reason. The reasoning lives in the press release. This site links both from the vessel timeline where a matching notice exists.

The United Kingdom: specifying a ship

UK sanctions are made under the Sanctions and Anti-Money Laundering Act 2018 through regulations for each regime. Most shadow-fleet designations sit under the Russia (Sanctions) (EU Exit) Regulations 2019.

The FCDO publishes the UK Sanctions List, and a ship entry is unusually informative. It carries a unique identifier such as RUS2176, the regime name, the date of designation, the IMO number, the currently believed flag, previous flags, type, tonnage and year built, and a statement of reasons written in plain English explaining why the Secretary of State considers the ship involved in the relevant activity.

For ships the measure is not primarily an asset freeze. It is shipping sanctions: the vessel is prohibited from entering UK ports, it can be given movement and detention directions, and its registration on the UK Ship Register can be terminated. An asset freeze applies where the owner is separately designated.

The statement of reasons is the most quotable text any of the three authorities publishes about a vessel, which is why UK entries appear so often as the reason line on vessel pages here.

The European Union: adding a row to Annex XLII

The EU route is different again, and it is the one most often misunderstood.

Vessels are listed under Article 3s of Regulation (EU) No 833/2014 and appear in Annex XLII of that regulation. The Council adopts a package of measures, the amending regulation is published in the Official Journal, and the annex gains rows. Each row gives a number, the vessel name (with “formerly” and the previous name where it has been renamed), the IMO number, the grounds for inclusion citing a point of Article 3s(2), and the date of application.

The measure is a port-access ban plus a prohibition on providing a range of maritime services. It is not an asset freeze. The consequence for anyone building a dataset is significant: these vessels do not appear in the EU’s consolidated financial sanctions file, because that file lists asset-freeze targets. A pipeline that reads only the financial sanctions file will miss the entire EU shadow-fleet list. This site parses the consolidated regulation text directly for exactly that reason.

What differs in practice

Who is the target. The US frequently reaches a vessel through its owner; the EU and UK name the hull.

What is prohibited. Blocking versus port entry versus services. A vessel can be barred from EU ports while remaining perfectly able to load in a third country and sell to a buyer who never touches the EU.

Where the reasoning lives. UK statement of reasons, EU grounds in the annex, US press release.

How a change is announced. OFAC publishes a dated notice for every addition and removal. The EU publishes an amending regulation. The UK updates the list and publishes notices. Delistings are the hardest to catch, which is why this site records whether a removal date came from an authority’s own notice or was inferred from a change in the list.

Reading a real record

Every vessel page here shows the three views side by side: the timeline with one entry per authority and per program, the current-listings table with the measure type, and the deterministic summary paragraph that states which authorities list the hull and which do not. If you want to see how the raw entries look before this site normalises them, how to read a vessel entry annotates one from each authority.