In June 2026, the oil tanker Caroline Bezengi a 274-metre Suezmax vessel built in 2001 and linked to Russia’s so-called Dark Fleet ran aground on rocks off Jazirat Al Qibliyyah in the Hallaniyat Islands, a strictly protected marine reserve on Oman’s Dhofar coast.

The tanker had loaded close to 800,000 to one million barrels of Russian crude at the Black Sea port of Novorossiysk in April, transited the Suez Canal in late May, and was bound for Gujarat, India, when its crew reported a suspected explosion off the coast of Yemen on June 8. The crew was evacuated without injury days later, and the disabled vessel subsequently drifted onto the rocks.

Months on, the situation has deteriorated sharply. By early August, satellite imagery showed the tanker partly submerged and listing, with all but one of its cargo tanks breached. Oman’s Environment Authority confirmed the slick had grown to nearly 400 square kilometres, before later estimates from Greenpeace and Al Jazeera put the spread at more than 2,000 square kilometres, with oil reaching the mainland coastline near Ras Madrakah and threatening Masirah Island. Roughly 40 kilometres of Omani coastline have been affected.

A Ship Built to Disappear
The Dark Fleet refers to hundreds of ageing oil tankers that Russia uses to circumvent Western sanctions imposed after its 2022 invasion of Ukraine. These vessels typically rely on:

Opaque ownership structures routed through shell companies

Frequent changes of name and flag registry

Disabled AIS tracking and ship-to-ship transfers at sea to obscure origin

The goal is to keep selling Russian crude despite the embargoes and price caps imposed by Western governments.

Why the Cameroonian Flag?
The Caroline Bezengi had cycled through several flag registries including Liberia, Panama, and Palau before flying Cameroon’s flag in late 2025 .

Under mounting international pressure, Yaoundé moved to deregister vessels linked to the Dark Fleet, acknowledging some had been operating fraudulently under its flag. The Caroline Bezengi was among roughly 39 vessels delisted from Cameroon’s registry in June, meaning it was, by the time of the spill, effectively flagless. Shipping databases now list its registered owner as Rentoor Shipmanagement and its operator as Villar Shipmanagement, both based in Shanghai, China neither of which has publicly responded to Omani authorities.

Vessels in Poor Condition
Dark Fleet tankers are typically old, poorly maintained, and rarely inspected in order to cut costs. Built in 2001, the Caroline Bezengi fits that profile: it reportedly lacked adequate Western insurance cover, a common feature of Russia’s shadow fleet, where vessels sometimes operate with fake insurance certificates altogether. The vessel is under sanctions imposed by the European Union, the United Kingdom, Switzerland, Canada, and Ukraine.

Damage and Cleanup Operations
The environmental risk to the region’s marine life is severe. The Hallaniyat Islands Marine Buffer Zone is a strictly protected habitat for endangered Arabian Sea humpback whales, seabirds, and turtles. Greenpeace and the Dutch conflict-monitoring group PAX have both warned the incident is on the verge of becoming a major environmental disaster.

Salvage and containment efforts are being coordinated by the British maritime risk firm Ambrey alongside Omani authorities, with floating barriers, specialist personnel, aircraft, and heavy equipment deployed to the site.

However, the region’s seasonal monsoon has severely hampered the operation, and the vessel’s ownership vacuum has complicated efforts to formally assign responsibility for the clean-up under international maritime law.

A ghost ship, a contested flag, and a real ecological disaster: beyond illegally circumventing sanctions, Russia’s Dark Fleet is now leaving a trail of oil along one of the Arabian Sea’s most sensitive coastlines.

Mustapha Bature Sallama
Medical/Science communicator, Private Investigator, Criminal Investigation and Intelligence Analysis,United States Institute of Peace (USIP), [email protected] +233555275880

References
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https://www.semafor.com/article/07/28/2026/abandoned-russian-shadow-fleet-tanker-leaks-oil-off-oman

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