The Caroline Bezengi: A Shadow Fleet Casualty and the Bill the Industry Will Pay

An oil spill off the coast of Oman has spread across somewhere between 390 and 2,000 square kilometers, depending on whose satellite analysis you accept, and reached roughly 40 kilometers of mainland coastline near Ras Madrakah on August 12. The source is a half-sunk tanker called the Caroline Bezengi, aground in the Arabian Sea, leaking crude for approximately six weeks with no effective containment.

The vessel is 81,085 gross tons. It has held no classification from an IACS society since 2009. Its registered owner is a shell company operating from its own manager's office in Shanghai, established seven months before the casualty. Its flag is recorded as Cameroon and marked false, meaning Cameroon denies ever having registered it.

Oman is party to both the 1992 Civil Liability Convention and the 1992 Fund Convention, which means a compensation system exists here and will function. What is worth examining is the route the money takes, the ceiling it runs into, and the single unresolved question that could remove it entirely.

The Casualty

The sequence, as far as it can be reconstructed from public reporting, runs as follows.

The vessel was on passage from Russia to India, having departed Novorossiysk on the Black Sea. That is the same port where Ukrainian drone strikes hit three Suezmax tankers at the CPC terminal in July, which we covered at the time.

In early June, according to British maritime security company Vanguard speaking to AFP, the tanker suffered explosions while sailing off the coast of Yemen. Water entered several sections of the hull. There has been no official explanation and no party has claimed an attack, though the vessel was transiting waters where Houthi forces have targeted commercial shipping.

Sometime after the explosions, the vessel ran aground off Oman. Leakage of stored oil was first detected in the first week of July.

The spill progression, per Greenpeace satellite analysis, was slow and then sudden. Roughly 45 square kilometers up to July 26. About 150 square kilometers by August 2. Approximately 600 square kilometers by August 4, a fourfold increase in two days that Greenpeace Germany's Nina Noelle attributed to a deterioration in the vessel's condition.

By August 11 Oman's environment agency put the affected area at around 390 square kilometers. Greenpeace's current estimate is 1,300 square kilometers. John Amos, an oil spill specialist who reviewed satellite imagery for Reuters, put it above 2,000 square kilometers. Greenpeace campaigner Hanen Keskes has noted that the slick is fragmented across multiple areas rather than forming one continuous mass, which partly explains the spread in estimates and makes response considerably harder.

The Al Hallaniyat archipelago, described by Keskes as one of the most ecologically significant marine areas in the region, is affected. Coral reefs, seagrass meadows, and habitats supporting endangered sea turtles and migratory seabirds are at risk. Oman has instructed citizens to avoid fishing in affected areas, report unusual odors and oil sightings, and has begun testing seafood in markets. Masirah Island is expected to be affected as the slick drifts northeast.

An international response involving vessels and aircraft is now forming, with Ambrey personnel due on scene. Oman is party to the 1990 OPRC Convention, which provides the framework for that cooperation.

What the Registry Shows

Public registry data on the Caroline Bezengi explains a great deal about how this happened.

The registered owner is Rentoor Shipmanagement Ltd, recorded care of Villar Shipmanagement Ltd at Room 702, 555 Xujiahui Lu, Huangpu Qu, Shanghai. Villar Shipmanagement is listed at the same address as both commercial manager and ISM manager. The ownership and commercial management entries date from 11 November 2025, approximately seven months before the explosions off Yemen.

An owner registered care of its own manager, at the manager's address, established shortly before the voyage in question, is the single-purpose structure that characterizes shadow fleet ownership. It exists sufficiently to populate a registry entry and not much further.

The classification position is more immediately explanatory. DNV-GL withdrew class in May 2009, following a survey recorded in May 2007. The vessel has therefore operated for seventeen years without class from an IACS society. No periodic structural survey. No hull thickness gauging. No independent verification of condition across that entire period.

Greenpeace attributed the acceleration in early August to deterioration of the vessel's condition. A tanker unsurveyed since 2007, holed by explosions and left aground for six weeks, is precisely the vessel in which that deterioration occurs.

The False Flag Mechanism

The flag designation carries a specific meaning. The IMO treats a vessel as flying a false flag where the country's administration confirms the ship is not legally registered under that administration. This is not a poorly performing registry. It is a claim of registration the named state denies.

Cameroon has been at the center of this problem. Its registry expanded by roughly 126 percent in a year, and on 6 February 2026 the Ministry of Transport suspended international registrations entirely, citing fraud carried out through unauthorized applications and disclaiming responsibility for the acts. In a letter to the IMO dated 16 June, the government reported that an official investigation had identified vessels illegally flying the Cameroonian flag, and that two fraudulent websites had been used to register them.

The method has been documented. Intermediaries operating from Türkiye, Montenegro, and Georgia obtained access to Cameroon's official digital signature and forged the signatures of the country's four maritime district heads, allowing them to issue fake registration certificates, bills of payment, and other ship documents.

The scale is significant. IMO GISIS data has recorded more than 520 falsely flagged vessels of all types, and more than 350 of those carry no class from any classification society. The Caroline Bezengi sits in both categories.

What Oman Can Actually Claim

The international regime for tanker oil pollution was built over five decades in response to a series of disasters. Torrey Canyon in 1967 produced the original Civil Liability Convention in 1969. Exxon Valdez in 1989 produced the 1992 revision. Erika in 1999 and Prestige in 2002 produced further amendments.

Oman's position within that structure is specific and it matters.

Oman is party to the 1992 CLC and the 1992 Fund Convention. It is a former party to the 1971 Fund Convention. It is also party to the OPRC Convention 1990, the Bunkers Convention 2001, and the Nairobi Wreck Removal Convention 2007.

Oman is not party to the 2003 Supplementary Fund Protocol.

That last point sets the ceiling. Two tiers are available here rather than three.

Tier one is the shipowner. Under the 1992 CLC, the registered owner of a tanker is strictly liable for pollution damage. Strict liability means the claimant does not need to prove negligence. The owner must prove one of a small number of specific exceptions applies.

Liability is limited by tonnage. As amended in 2000, the formula runs 4.51 million SDR for a ship of 5,000 gross tons or less, plus 631 SDR for each additional ton, capped at 89.77 million SDR.

For 81,085 gross tons that produces approximately 52.5 million SDR, or roughly $70 million at recent exchange rates. The vessel sits well below the tonnage at which the cap would bite.

Tier two is the 1992 Fund. The Fund pays in three situations. Where damage exceeds the shipowner's CLC limit. Where the shipowner is exempt from liability under the CLC. And where the shipowner is financially incapable of meeting their obligations in full and the insurance is insufficient to pay valid claims.

The maximum payable by the 1992 Fund is 203 million SDR, irrespective of ship size, inclusive of anything actually paid by the shipowner under the CLC. That is roughly $270 million.

That figure is the ceiling for this casualty. Without the Supplementary Fund, there is no third tier and no route to the 750 million SDR available in states party to the Protocol.

Why Tier One Will Deliver Nothing

The $70 million theoretically available from the shipowner rests on conditions this vessel does not satisfy.

There is no valid CLC certificate. Certificates under the Convention are issued by or under the authority of the flag state. Where the flag is false, meaning the named state confirms the vessel was never registered, no certificate was validly issued by that state. Any certificate the vessel carried came from the same fraudulent operation that produced its registration documents. The compulsory insurance requirement at the center of the Convention rests here on a document with no issuing authority behind it.

Genuine P&I cover was effectively unavailable. No International Group club enters an unclassed vessel. IACS classification is a threshold condition rather than a preference. Whatever financial security this ship presented to port authorities across seventeen years of trading, it was not conventional cover from the market that ordinarily stands behind a CLC certificate.

The registered owner is a shell. Strict liability attaching to the registered owner is only useful if that owner is solvent and within a jurisdiction that will enforce a judgment. Rentoor Shipmanagement Ltd is identifiable on paper, registered care of its own manager, and established weeks before the voyage. Pursuing an eight-figure pollution judgment against it is a theoretical exercise.

Which Means the Fund Pays, and Who Funds It

This is where the system does its work, and where the real story sits.

The third Fund trigger fits this casualty exactly. The shipowner is financially incapable of meeting its obligations and the insurance is insufficient to pay valid claims. Oman is a Member State. Omani claimants, including the government for cleanup costs and coastal communities for fisheries losses, can claim against the Fund.

The 1992 Fund is financed by contributions levied on any person who receives more than 150,000 tonnes of crude oil or heavy fuel oil in a calendar year in a Member State. That means refiners, importers, and terminal operators across the membership. Which is to say the legitimate oil and shipping industry.

So the arithmetic runs as follows. A vessel operating outside class, outside any genuine insurance market, under a flag its supposed state denies issuing, owned by a shell company established seven months before the casualty, produces a spill across a protected marine area. The cost of remediating it falls on levies paid by companies that maintain class, buy real insurance, register under genuine flags, and comply with every obligation the Caroline Bezengi avoided for seventeen years.

The Fund holds rights of recourse against the shipowner. Against Rentoor Shipmanagement Ltd, those rights are worth nothing.

There is also the ceiling. The 203 million SDR available is substantial, but large spills have exceeded it comfortably. Prestige and Erika both generated claims running into billions of euros. A spill covering up to 2,000 square kilometers, reaching mainland coastline across 40 kilometers, affecting an archipelago described as ecologically critical, and threatening a fishery, is not obviously a claim that stays inside $270 million. Whatever exceeds that figure is not compensated at all, because Oman has no third tier.

The Question That Could Remove Everything

There is one unresolved issue that dwarfs the rest.

Article 4(2)(a) of the 1992 Fund Convention provides that the Fund incurs no obligation if it proves the pollution damage resulted from an act of war, hostilities, civil war, or insurrection. The 1992 CLC contains an equivalent exception for the shipowner.

If the explosions off Yemen in early June were the result of hostile action, both tiers may be excluded. Not shifted from one to the other. Removed.

Two things cut against that outcome and both are worth understanding.

The burden sits with the Fund. The Convention requires that the Fund prove the damage resulted from an act of war. It is not for Omani claimants to establish that it did not.

And the evidence is thin. No official explanation has been given for the explosions. No party has claimed responsibility. The vessel was in waters where attacks have occurred, which is suggestive rather than probative. Proving hostilities as the operative cause, against a vessel with no class, no survey since 2007, and structural condition unknown for seventeen years, is a considerably harder case than the geography alone implies.

That is the litigation that will decide who bears this loss, and it has not started yet.

The Wreck

Beyond the pollution claim sits the ship itself. A half-sunk tanker aground with cargo aboard is a continuing source of pollution, and removal is expensive, technically difficult, and in this location dangerous.

Oman is party to the Nairobi International Convention on the Removal of Wrecks, which gives coastal states rights to require removal and establishes owner liability for the cost, backed by compulsory insurance.

It runs into the identical problem. The liability attaches to an owner who cannot pay and is backed by insurance that does not exist. Where the owner does not act, Oman chooses between funding removal itself and leaving the wreck in place.

Oman is currently coordinating an international response to a casualty it did not cause, involving a vessel it has no relationship with, carrying a cargo bound for India.

What Operators Should Take From This

Verify the cover behind the certificate. A CLC certificate is a piece of paper, and this casualty shows the paper can be manufactured wholesale, flag registration included. Confirming club entry directly rather than accepting a certificate is the only meaningful check on a counterparty vessel.

Check class status first. IMO data shows more than 350 of the 520-plus falsely flagged vessels carry no class at all. Class status is public, quick to check, and a vessel unclassed since 2009 tells you almost everything before you look at anything else.

Know which conventions apply where you trade. Oman's position illustrates the point precisely. Party to the CLC and the 1992 Fund, not to the Supplementary Fund Protocol. That single fact is the difference between a $270 million ceiling and a $1 billion one, and it varies state by state across your trading pattern.

Understand that you are already paying for this. If your business receives contributing oil in a Fund Member State, your levies are part of the mechanism that will compensate Oman. The externality created by shadow fleet operation is not confined to coastal states. It is collected from the legitimate industry by design.

Review war risk geography before departure. A voyage from the Black Sea to India through the Red Sea and the Gulf of Aden crosses multiple designated high risk areas. Whether cover responds, and under which policy, is a question to settle before sailing rather than after.

The Bottom Line

The international oil pollution compensation regime rests on a simple architecture. Attach strict liability to an identifiable owner, require that owner to carry insurance, and back the whole thing with an industry-funded pool for the cases where the owner cannot pay.

The shadow fleet defeats the first two elements comprehensively. Denied flags, withdrawn class, shell ownership, and insurance that exists only as a document remove every assumption the first tier depends on.

The third element still works, and Oman will be compensated up to 203 million SDR, unless the war exclusion is established and removes even that.

The cost lands on the industry that complies. That is the actual price of the shadow fleet, and it is being paid by companies that had no dealings with the Caroline Bezengi and never will.