A shadow tanker, on this desk, is not a ghost story. It is usually old, flag-hopping, out of IACS class, outside the International Group of P&I clubs, and casual with its name and its AIS. The cargo is the point. The waterway is the collateral.

The incident

On 8 June 2026 the crew of the Suezmax Caroline Bezengi (IMO 9224439, built 2001, about 274 metres) reported an explosion after she had left the Maritime Security Transit Corridor. Reuters placed that first report off Yemen. No party has claimed an attack. Some coverage describes a suspected limpet mine. That is a theory. This desk does not name an attacker.

The crew came off unhurt a few days later. The ship was then driven onto the rocks at Al-Qibliyyah, in Oman’s Hallaniyat Islands, inside a marine protected area. She was still there in mid-August — listing, tanks breached, leaking.

She had loaded Russian crude. Trade reporting puts the stem in the order of 800,000 to 1 million barrels; Kpler had her at Sheskharis / Novorossiysk in May, bound for Asia. She had transited the Suez Canal on 30 May. The wreck in Oman is not another world from the canal. It is the next week of the same voyage.

UK and EU sanctions sit on the ship. Cameroon dropped the flag in late May; later traces go to “unknown” or repeat an old ensign. Listed owner/manager in open coverage is Rentoor Shipmanagement, Huangpu, Shanghai. Past association with Sovcomflot is reported. She is not entered with an International Group P&I club. Greenpeace says the October 2025 paper trail pointed at an opaque Kyrgyz name, Arsenal. Whether any of that cover is real, or large enough for a wreck in a reserve, is not established. The owner has not stepped forward in public.

The slick. Oman’s Environment Authority, via the state news agency on 10 August, put the oil at about 390–400 square kilometres. Independent satellite analysts cited by Reuters later put a much larger figure on the plume, including a 2,000-square-kilometre reading. Greenpeace Germany, from imagery to 4 August, had about 600. Those are different methods and different days. We do not average them. What is not in dispute: oil has reached Omani shoreline, the wreck sits in habitat for Arabian Sea humpback whales, turtles and seabirds, and for weeks there was no serious salvage signature on the wreck.

Ambrey said in mid-August it had been engaged and that salvage craft were moving. That is late for a loaded Suezmax on rocks in the southwest monsoon.

This is what a shadow tanker looks like when the luck runs out: no useful insurer, no owner on the phone, a coastal state left with the animals and the bill.

Other cases: the engine that stops in the cut

Bezengi is the photograph. The more ordinary failure is a main engine that dies where you cannot drift.

Suez, 28 October 2025 — Komander. The Russian-flagged crude carrier Komander (IMO 9271585, built 2004, 274 metres, about 150,600 dwt) suffered a main-engine failure in the southern canal and grounded near kilometre 47–48. She was last in a southbound convoy of 19. SCA put tugs on her and refloated her the same afternoon. No pollution, no injuries — and northbound ships waiting. Previous names in the open file include Krishna 1 (Panama) and Prudence (Comoros). Trade reporting had her with Murmansk crude for China. Sanctioned. A near-Ever-Given that ended in two hours because the tugs were already in the cut.

Suez roads, 25 July 2026 — Prisma. From the bridge. This desk watched Prisma (IMO 9299678, Sierra Leone / Freetown, built 2005, 274 metres) sitting at the Suez anchorage with a main-engine failure, cancelled from that day’s northbound convoy. VesselFinder later shows her leaving the Suez anchorage on 26 July. Greenpeace lists her on the shadow file. The failure happened at anchor, not in the channel. That is luck, not a safety system. Sierra Leone is a junk flag. It is still a flag. We do not call her stateless.

Suez, 25 July 2026 — the name on the hull is not the name in the AIS. From the bridge. Same waterway, same week: hull painted КАРНЕОЛ, AIS broadcasting VEXIA, IMO 9387255. One ship. UK sanctions sit on that IMO. Open registers bounce her between VEXIA, KARNEOL, Cameroon and Russia. That is UNCLOS Article 92(2): two flags according to convenience, assimilated to a ship without nationality. It is also how you make a VTS, a convoy planner and a salvor argue about who they are looking at.

Baltic, January 2025 — Eventin. Panama-flagged Eventin lost her main engine after Ust-Luga and drifted toward Rügen with about 100,000 tonnes of crude. Germany towed her, then tried to seize ship and cargo. A court later blocked the confiscation. The mechanical fact is the one that matters here: a loaded tanker, no reliable plant, in someone else’s traffic.

The pattern is not “accidents happen.” The pattern is old plant, thin maintenance, and a habit of sending that plant through the two cuts the world cannot replace — Suez, and the Singapore Strait.

The other danger: a ship the VTS does not see

Pollution is the wreck. Collision is the near-miss you do not get a satellite picture of.

Shadow tankers go dark. They switch AIS off, or they broadcast a name that is not on the hull. In a traffic separation scheme that is not a sanctions footnote. It is a ship that Vessel Traffic may not have as a live target, and that the ship you are on may only see with the eye and the radar, late.

This is what that ship looks like from the water.

Rust. Names painted out. AIS off. No flag. No lights. That is not a “rogue tanker” headline. That is a moving object with a cargo of crude and no identity in one of the densest approaches on earth. This is the hull that turns a near-miss into a coastline.

Singapore has already said the problem out loud. In December 2025 Lloyd’s List Intelligence figures cited in open reporting put at least 27 such ships through the Singapore Strait in a few days, with about 130 waiting around the Riau Archipelago. The complaint from the authorities was the same as a Master’s: tracking off, identities false, risk up.

From the bridge — Pengerang, Singapore Strait

Approaching the Pengerang boarding ground from the east, this desk was told to squeeze to the right-hand TSS border. On the starboard side, overtaking, was the VLCC Big Star — now Kiara M (IMO 9285823, built 2004). AIS off. VTIS did not have her. She did not answer on VHF.

There is no good answer to that order. Move right and you close the only water left between you and a dark overtaking hull. Hold your line and you are disobeying the VTS in one of the densest lanes on earth. The ship was stopped, or as near as a ship in a lane can be stopped, until the tanker went by.

That is the part people who do not keep a watch miss. A large ship at low speed does not “just pause.” Rudder authority dies, the set takes you, the next ship in the lane is still doing twelve knots, and you have built a wall with a VLCC that is not on anyone’s screen. A shadow flag does not only hide a cargo. It hides a moving object from the only organisation that is supposed to keep the lane honest.

What next

Caroline Bezengi is what a shadow tanker does to someone else’s reserve when the hull opens and no insurer answers. That is Oman’s problem today.

The next one does not need an explosion off Yemen. It needs the file we already have: an old tanker, AIS off or a name that is not on the hull, a VTS that does not own the picture, and a ship in the lane that has to stop because the overtaking tanker will not answer on VHF. After that collision the slick is not in Dhofar. It is on the Johor shore, on the islands that sit inside the TSS, on a beach the coastal state actually has to clean. An Aframax cargo is enough. A Suezmax is what Bezengi already is. A VLCC is what came up the starboard side at Pengerang.

Sanctions are a reason these ships look like this. They are not why a coastal state should care. A coastal state should care because the oil does not ask who issued the certificate. It asks who had the traffic picture and did not use the regulations already on the book.

So the question for Singapore, for SCA, for every authority that still treats this as someone else’s problem, is not “may we.” It is: what next — and how do you apply the rules you already have before the beach is black?

Prevent, then apply

The law is not empty. It is unused.

SOLAS / AIS. In the Singapore Strait a ship is required to broadcast identity and movement. Dark in the TSS is not a lifestyle. It is a breach you can hail, log and hand to the next port. If VTIS does not see her, that is the safety system failing in public.

COLREGs. A ship that overtakes with no AIS and no VHF is not “hard to classify.” She is a vessel you cannot agree a passing with. Rule 13 and Rule 7 do not pause for a shadow flag.

UNCLOS 92(2) — and no more than that. Two names, two flags, hull against AIS — assimilated to a ship without nationality. A junk flag that the registry still claims is a flag. Prisma under Sierra Leone is Sierra Leone’s until Freetown drops her. A deleted flag, or two flags used according to convenience, is not. КАРНЕОЛ / VEXIA is the 92(2) file. OXIS, photographed from the water with names painted out, AIS off and no flag, is the no-nationality file. Do not mash them into one slogan.

Singapore’s own words. The acting transport minister has already said shadow ships may be denied entry or detained in Singapore waters. That sentence is the policy. The gap is the live lane. Transit passage protects a ship entitled to it. A proven stateless ship is a weak claimant. Detention belongs at the boarding ground, the anchorage, the first request for a pilot or a bunker — not by parking a VLCC in the eastbound stream. But “we cannot, she is transiting” is not a serious answer the day the boom goes on the East Coast.

The Strait is not Singapore’s alone. The TSS is Singapore, Malaysia and Indonesia. The 130 hulls off Riau were not in Singapore. That is a reason to work the three-state channel. It is not a reason to do nothing in the water you do control.

Port state control. Class, insurance, manning, identity. The first berth after the strait is enough if someone uses it. Eventin sat a year off Rügen because the lawyers arrived before the checklist.

Suez can say no. The canal is not a strait. SCA can require IACS class, International Group P&I, and a matching hull / AIS / IMO before the convoy. Komander already showed the engine-stop in the cut. Prisma showed it at the roads. The next one inside the channel is an Ever Given with a cargo that burns on water.

A state that used the book. In January the French Navy stopped Grinch (IMO 9288851) in the Alboran Sea for a PREMAR flag check. Name in the frame, warship alongside. That is what “apply the regulation” looks like. It is not a mid-TSS stunt. It is a flag check on a ship that would not stand up to one.

Publish the list. Dark in the TSS. Hull name ≠ AIS. Flag the state has already deleted. Weekly, with IMO. Shame is cheaper than a shoreline claim, and it gives the next Master something VTIS did not have when Big Star came up the starboard side.

For the Master, tonight. If VTS tells you to squeeze the lane and you have a dark overtaking ship on the same side, say the target. “I have a large tanker, AIS off, overtaking starboard, not answering.” Make them own the picture. Do not kill your way to the border at four knots unless you have water and a plan to start again.

Oman is already writing the environmental statement. Singapore and Egypt still get to write the prevention statement.

What happens when the tanker is not on a rock off Dhofar, but in the lane, in the cut, in water you actually control?

Apply the regulations. Or explain, after the collision, why the coast was an acceptable risk.

The ships