On March 11, the Thai cargo ship Mayuree Naree was struck by two projectiles whereas crossing the Strait of Hormuz, one of many world’s most necessary waterways positioned between Iran and Oman. A fireplace broke out within the engine room, and whereas 20 sailors had been rescued, three remained trapped contained in the stricken vessel. Their stays had been discovered weeks later when a specialised rescue staff boarded the vessel, which had run aground on the shores of Iran’s Qeshm island.
At about the identical time, a “shadow fleet” of tankers continued to navigate the exact same waters safely. Working with pretend flags, disabled alerts and unspecified locations, this covert armada survived as a result of it operates outdoors the normal guidelines of maritime commerce.
Beneficial Tales
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Iran threatened to dam “enemy” ships passing via the Strait of Hormuz – a vital chokepoint for a fifth of the world’s oil – within the wake of the United States-Israeli conflict launched on February 28. Quickly, navigation via the strait was disrupted amid fears of assaults.
Following a short lived ceasefire on April 8, the US imposed a full naval blockade on Iranian ports on April 13. Theoretically, visitors via the strait ought to have come to a whole halt.
Nonetheless, monitoring knowledge reveals a remarkably totally different actuality.
An unique Al Jazeera open-source investigation tracked 202 voyages made by 185 vessels via the strait between March 1 and April 15, navigating each beneath fireplace and throughout blockade traces.
The numbers behind the shadows
To grasp how the strait operated beneath excessive stress, Al Jazeera’s Digital Investigative Unit monitored the waterway day by day, cross-referencing vessel Worldwide Maritime Group (IMO) numbers with worldwide sanction lists from the US Workplace of Overseas Belongings Management (OFAC), the European Union, the UK and the United Nations. An IMO quantity is a novel seven-digit determine assigned to business ships.
Of the tracked voyages, 77 (38.5 p.c) had been instantly or not directly linked to Iran. Notably, 61 of the ships transiting the strait had been explicitly listed on worldwide sanctions lists.

The investigation divided the battle into three distinct phases to map the fleet’s behaviour:
- Section 1: Open Warfare (March 1 – April 6): 126 ships crossed the strait, peaking at 30 vessels on March 1. Amongst these, 46 had been linked to Iran.
- Section 2: The Truce (April 7 – 13): 49 ships crossed throughout this fragile pause. Greater than 40 p.c of those vessels had been tied to Iran, together with the US-sanctioned, Iranian-flagged Roshak, which efficiently exited the Gulf.
- Section 3: The US Blockade (April 13 – 15): Regardless of the specific naval blockade, 25 ships crossed the strait.
Breaking the blockade
When the US blockade took impact, the shadow fleet tailored instantly.
The Iranian cargo ship “13448” efficiently broke the blockade. As a result of it’s a smaller vessel working in coastal waters, it lacks an official IMO quantity, permitting it to evade conventional sanction-monitoring instruments. The vessel departed Iran’s Al Hamriya port and reached Karachi, Pakistan.
Equally, the Panama-flagged Manali broke the blockade, crossing on April 14 and penetrating the cordon once more on April 17 en path to Mumbai, India.
The investigation uncovered widespread manipulation of Automated Identification System (AIS) trackers. Vessels such because the US-sanctioned Flora, Genoa and Skywave intentionally disabled or jammed their alerts to cover their identities and locations.
Faux flags and shell corporations
To obscure final possession, the shadow fleet closely depends on a fancy internet of “false flags” and shell corporations. The investigation recognized 16 ships working beneath pretend flags, together with registries from landlocked nations like Botswana and San Marino, in addition to others from Madagascar, Guinea, Haiti and Comoros.


The operational community managing these ships spans the globe. Working corporations had been based in Iran (15.7 p.c), China (13 p.c), Greece (greater than 11 p.c) and the United Arab Emirates (9.7 p.c). Notably, the operators of almost 19 p.c of the noticed vessels stay unknown.
The toll of a parallel system
Regardless of the extraordinary navy stress, power carriers dominated the visitors, with 68 ships (36.2 p.c) transporting crude oil, petroleum merchandise and fuel. Ten of those tankers had been instantly linked to Iran. Non-oil commerce additionally continued, with 57 bulk and common cargo ships crossing through the open conflict part, 41 of which had been tied to Tehran.

Earlier than the conflict, no less than 100 ships crossed the Strait of Hormuz day by day. At present, a staggering 20,000 sailors are trapped on 2,000 ships throughout the Gulf – a disaster the Worldwide Maritime Group described as unprecedented since World Warfare II.
A shadow Iranian fleet, in the meantime, has been navigating seamlessly as a part of a parallel maritime system born from 47 years of US sanctions on Tehran. Washington slapped sanctions on Tehran following the 1979 Islamic revolution that toppled the pro-Washington ruler Shah Mohammad Reza Pahlavi. The 2 international locations have had no diplomatic ties since 1980.

