25MAY

Shadow fleet uses dead ships' identities

2 min read

13:55UTC

Maritime intelligence firm Windward documented tankers transiting Hormuz under the identities of scrapped vessels, with 14 State Department-sanctioned ships tracked in the region.

← Back to Two markets, two prices on one Iran deal Jump to analysis ↓

ConflictDeveloping

Key takeaway

Blockade conditions improve the economics of dark fleet identity spoofing.

Windward documented a scrapped LNG carrier's registry reused by an active tanker last week, the clearest evidence of systematic identity fraud in Hormuz transits ¹. Under blockade conditions, the economics of sanctions evasion improve: legitimate passages are blocked, making dark-fleet alternatives more profitable .

The 14 State Department-sanctioned vessels represent the visible layer. The identity-spoofing technique requires cross-referencing physical vessel data against registry records, something CENTCOM patrol vessels are unlikely to do in real time. When GL-U lapses, more cargo will be pushed into legal grey zones, widening the incentives for identity fraud.

Deep Analysis

In plain English

Every ship at sea has a unique identity number, like a vehicle registration, that is supposed to be permanent and attached to that vessel for its entire working life. When a ship is scrapped, broken up for metal, its registration is supposed to be cancelled. What the shadow fleet is doing is taking the cancelled registration numbers of scrapped ships and using them on active, sanctioned tankers. It is the maritime equivalent of putting a dead person's driving licence on a car to evade police checks. Windward, a maritime intelligence company, tracked 14 of these ships carrying Iranian oil through the Strait of Hormuz. The blockade makes this worse: because legitimate transit routes are now closed, there is more money to be made by cheating, so more ships will do it.

What could happen next?

Consequence
Blockade conditions increase the financial incentive for identity spoofing, expanding the dark fleet's operational scope faster than enforcement capacity can track.
Risk
CENTCOM boardings of vessels using scrapped ship identities risk detaining cargoes from flag states not party to the blockade, generating diplomatic incidents.

Source Landscape

This story draws on neutral-leaning sources from Israel

Israel

Primary parallel: Russia's post-2022 shadow fleet assembled the same identity-spoofing infrastructure at scale after Western insurers cut off cover following the Ukraine invasion.

Lloyd's of London and the London P&I Club documented the pattern in 2023: tankers formerly flagged under Marshall Islands or Liberia registries re-registered under Gabon, Palau, or Cameroon while retaining IMO numbers from vessels already scrapped. Iran's current shadow fleet is operating the identical playbook, accelerated by the Hormuz blockade.

Counter-parallel: Russia's 2022-24 shadow fleet operated in open water where AIS spoofing alone was sufficient evasion. Hormuz is a 33km chokepoint with CENTCOM patrol assets now present, so the identity fraud must survive physical inspection rather than satellite tracking alone, raising the detection risk substantially.

Identity spoofing raises the effective cost of sanctions enforcement. CENTCOM boardings require physical verification against registry records, a process that takes hours per vessel and cannot be applied at scale across Hormuz traffic. The 14 verified vessels are the visible layer; the true number using borrowed identities is higher by definition, because the technique is designed to defeat remote monitoring.

For Iran, the economics improve under blockade: a sanctioned tanker that cannot transit legitimately faces zero incremental cost from adding identity fraud to its evasion toolkit. The marginal risk is absorption of a CENTCOM boarding; the marginal gain is continuation of oil revenue that would otherwise be fully blocked.

Sources:Windward Maritime Intelligence Daily·Windward Maritime Intelligence Daily·Windward Maritime Intelligence Daily

Mentions:Windward →Islamic Revolutionary Guard Corps (IRGC) →shadow fleet →Iran →International Maritime Organization →London P&I Club →Prima →Marshall Islands →Russia →Lloyd's of London →Strait of Hormuz →Ukraine →CENTCOM (US Central Command) →General License U →

First Reported In

Update #67 · Trump blockades Iran on a tweet

Windward Maritime Intelligence Daily· 13 Apr 2026

Read original →

Causes and effects

This Event

Shadow fleet uses dead ships' identities

Sanctions evasion through identity spoofing will accelerate under blockade conditions as legitimate transit routes close.

Led to

GL-U lapses Saturday, Treasury silent 25 days

Windward's 14-vessel dark-fleet identity fraud sample (ID:2292) illustrates how GL-U lapse would expand the grey-zone economics that make registry spoofing profitable.

Occurred 14 Apr 2026

Read story →

Brent at $94.79: markets price the gap

Dark-fleet sanctioned vessels moving freely under CENTCOM's carve-out, as documented on 12 April, caps Brent upside by keeping partial supply flowing.

Occurred 14 Apr 2026

Read story →

Different Perspectives

Lloyd's of London

The Joint War Committee left Hormuz war-risk premiums at $10-14 million per voyage on 25 May, declining to move on Brent's 5% fall. The JWC's protocol requires a UN Security Council resolution or bilateral government certification letter before de-listing, and neither has arrived: a verbal understanding does not satisfy the formal condition the reinsurance market's treaty terms require.

Gulf Arab producers

Saudi Arabia and UAE depend on Hormuz for their own crude exports; Aramco CEO Nasser has warned no oil market recovery arrives until 2027 if the blockade continues past mid-June. Monday's $98.96 Brent settlement shortens nothing for Gulf producers without a signed instrument and a Pentagon mine-clearance timeline that runs up to six months post-ceasefire.

Qatar

Qatar holds $12bn of frozen Iranian assets at the centre of the sequencing dispute but cannot release them without explicit US Treasury authorisation, given the original freeze was a US instrument. As the asset-holding state, Qatar's leverage is real but passive: it is the escrow holder, not the decision-maker, and any resolution requires US Treasury sign-off that Trump has withheld.

Pakistan

With both Prime Minister Sharif and army chief Munir simultaneously in Beijing on 25 May, Pakistan has for the first time consolidated its civilian and military mediation tracks under China's roof. Munir's direct Tehran-to-Beijing flight signals that the security and financial threads of the sequencing problem are now being worked in parallel rather than sequentially.

China

Beijing hosted Pakistan's principal mediators and Iran's China envoy Ghalibaf simultaneously on 25 May while its banking regulator capped new state-bank lending to five sanctioned refiners. China is simultaneously the most credible third-party underwriter of the $12bn sequencing and the state whose institutions face live OFAC secondary-sanctions exposure if the deadlock persists through GL V's expiry.

United States

Trump posted on 24 May that the blockade holds until a deal is certified and signed, ruling out the informal MOU structure both sides had been building. The 'certified, and signed' condition is the first operational bar Trump has attached in 87 days, but it arrived without an executive instrument, maintaining the gap between posted ultimatum and signed US policy.