Russian-Linked Tanker M/V Mersin Floods Off Senegal After Voyage from Black Sea Port

Image by Knelstrom Media

By Martin Foskett | Newswire | Knelstrom Media

​SENEGAL, Dakar -- A Panama-flagged oil and chemical tanker with documented links to Russia's so-called shadow fleet remained semi-submerged off the coast of Senegal on Monday, following the reported flooding of its engine room late last week. The 2009-built M/V Mersin, listed under Turkish-connected ownership and last departing the Russian export port of Taman, had been anchored outside Dakar for several days before it began taking on water between 27 and 28 November.

​The 147-metre vessel, operating under IMO number 9428683, had arrived off Senegal after a protracted voyage from the Black Sea. According to automated identification system (AIS) data, the tanker left Taman on 21 August with a declared destination of Dakar and an estimated arrival date of 25 September. Its draught reading of 11.8 metres before the incident suggested it was carrying either crude or petroleum products, although authorities have not publicly confirmed the cargo manifest.

Crew members were evacuated without injury as the Mersin developed a list and began partially flooding. By 30 November, Senegalese maritime services had deployed containment booms and support vessels amid concerns of a potential spill. Officials said no significant pollution had been detected but warned the risk remained while the tanker sat low in the water, its stern closest to full submersion.

A slow voyage and a sudden failure

Mersin's extended transit from the Black Sea appeared consistent with the operational profile of vessels in the informal network that transports Russian-origin oil via indirect routes. Ships in this circuit often conduct lengthy layovers, evasive routing, and limited port engagement. Tracking data shows the tanker moving steadily through the Mediterranean and along the West African coastline before anchoring off Dakar for several days.

Maritime officials in Dakar said the crew issued a distress notification after noticing water accumulation in the engine room. No collision was reported, and the anchorage had seen calm weather at the time. The engine room, situated low in the hull, can flood rapidly once a breach or mechanical failure occurs, though the cause of the ingress has not yet been established.

Inspection teams have so far been unable to enter the affected compartments due to unsafe conditions. Salvage planners are assessing whether the tanker can be stabilised in situ or must be moved to a shallower area for partial offloading.

A spokesperson for Senegal's port authority described the situation as "under control but sensitive," adding that preventive measures were in place to limit environmental impact. "Our priority is to secure the area and maintain containment. The vessel remains stable but partially submerged. Further inspection will determine next steps," the spokesperson said.

Questions and unverified theories

The flooding occurred days after Ukrainian naval drones struck two separate tankers in the Black Sea--Kairos and Virat—in confirmed attacks near Turkish waters. Those incidents targeted vessels assessed to be engaged in the Russian fuel trade. No evidence has emerged linking Mersin's condition to any hostile action, and Ukrainian officials have made no statements suggesting involvement. At the time of the drone strikes, the Mersin had already completed its passage through the region and had not broadcast any distress signals.

Despite this, a handful of media outlets and online commentators have speculated whether sabotage or delayed structural damage might have played a role. Maritime analysts contacted by the Newswire noted that ageing tankers operating in loosely regulated circuits can experience latent mechanical or structural failures, particularly if maintenance is deferred. However, experts cautioned against reaching any conclusions before divers can access the hull.

One ship-tracking researcher, speaking in a professional capacity, said: "We have no data indicating a collision, explosive event, or external impact. At this point, a conventional mechanical fault is at least as plausible as any deliberate action. But until inspections are carried out, the cause remains unknown."

The Mersin appears on several unofficial lists compiled by analysts monitoring vessels handling Russian-origin oil through third-country intermediaries. These lists are not authoritative, but they reflect broader attempts to map the opaque networks that have grown since the imposition of Western price caps and sanctions.

A fleet under scrutiny

The incident has renewed attention on the older tankers sector, which has proliferated in global shipping lanes over the past three years. Insurance gaps, infrequent dry-dock inspections, and complex ownership chains can create operational risks. Many of these vessels operate under "flags of convenience," with Panama, Liberia, and the Marshall Islands among the most common registries.

Authorities in Dakar have not commented on the ownership structure behind the Mersin, though public records indicate links to Turkish-registered entities, including Besiktas Shipping and Mersin Shipping Inc. There is no allegation of wrongdoing against the companies; the vessel's ties to Russian oil supply chains stem from its documented calls at export terminals such as Taman.

Environmental observers in Senegal have expressed cautious relief that no spill has yet materialised. The coastline near Dakar includes fishing grounds vital to local livelihoods, and previous tanker leaks in the region have caused prolonged disruption. For now, water around the anchorage shows no visible sheen, according to officials performing routine passes with small patrol craft.

A managed emergency at sea

As the vessel remains partially submerged, salvors are reviewing options that include dewatering, patching, and controlled towage. Weather conditions along the Senegalese coast have remained stable, with low swells and light winds—conditions that typically aid containment work. The quiet surface of the anchorage contrasts with the unresolved questions beneath it.

A member of the local maritime brigade, observing the tanker from a patrol boat on Sunday, described the scene as "unmoving, like a ship waiting to decide which way to go." The comment captured the static quality of the situation: a vessel neither sunk nor saved, suspended in a narrow margin of seawater and steel.

Investigators have begun gathering logbooks, AIS records, and statements from the rescued crew. These will form part of a preliminary report expected later in December, though a complete technical assessment may take months. International maritime conventions require coastal states to manage pollution risks, but responsibility for investigating the vessel's structural condition typically falls to the flag-state authorities—in this case, Panama.

Awaiting clarity

For now, the Mersin remains at anchor, its bow marginally higher than its stern, with tugs maintaining a patient perimeter. The faint mechanical hum of support vessels carries across the water during daylight, while nocturnal operations rely on deck lights reflected in the slow swell.

With no confirmed cause of the flooding and no direct link to regional tensions, the incident stands as a marine casualty awaiting formal inquiry. Senegal's authorities continue efforts to stabilise the hull, and international maritime observers are following developments closely, given the vessel's recent routing from a Russian export hub.

The eventual findings—whether mechanical, structural, or otherwise—will shape decisions on the ship's recovery and any subsequent regulatory measures. For now, the tanker's condition remains unchanged, a partially submerged silhouette off the Dakar coast as the investigation begins.