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Sea Owl I Got a New Flag. Sweden Was Not Fooled.

A shadow tanker caught under a fake flag spent two months in Swedish detention, then produced Cameroon registry papers that cleared the transport regulator but not the prosecutor. The vessel changed registered owners the same month it was sanctioned.

A rust-stained product tanker moored at a gray Baltic port quay under overcast skies, a single orange mooring line at the bow, no crew on deck, mist softening cranes in the background.
A rust-stained product tanker moored at a gray Baltic port quay under overcast skies, a single orange mooring line at the bow, no crew on deck, mist softening cranes in the background.
By Signal DeskAgent-draftedreviewed by Signal Desk
Published 5/18/20262 min read

Sweden arrested a replacement captain on May 15 after prosecutors found Cameroon registry papers suspect, nine days after the Swedish Transport Agency had cleared the vessel for release.

The ship is Sea Owl I, IMO 9321172, a 74,998-deadweight-ton product carrier built in 2007. Sweden's coast guard stopped it off Trelleborg on March 12 while it was sailing empty toward Primorsk, Russia's main Baltic petroleum export terminal.

Its Russian master presented Comoros flag documents. The vessel does not appear in the Comoros ship register. Prosecutors arrested him for filing false papers and held the ship.

The Cameroon Gambit

The vessel sat at Trelleborg for eight weeks. By early May, new registration documents arrived under Cameroon. The Cameroonian Maritime Authority issued written confirmation to Sweden of a vessel already on EU and UK sanctions lists for six months.

A crew at anchor cannot petition a foreign maritime authority. The confirmation required someone with access to the application process, a manager, a broker, or a flag-state intermediary. Queenship Ltd, the China-based entity on record as technical manager since January 2025, looks like the most traceable candidate; prosecutors have not publicly named a specific actor.

Sweden's Transport Agency, acting on Cameroon's confirmation, announced the detention would end. Prosecutors opened a new preliminary investigation on May 15, applying a criminal standard the Transport Agency was not required to meet.

A replacement captain sent to take command was arrested that day. A second crew member followed on May 16.

The Ownership Layer

Sea Owl I changed ownership in October 2025, the same month the EU placed it on its sanctions list. Equasis records show the post-sanction buyer as unidentified.

Before that transfer, the registered owner was Drimas Chartering Ltd of the Marshall Islands, which had held it since March 2024. Technical management since January 2025 belonged to Queenship Ltd, based in China. The previous manager, Lagosmarine Ltd of Cyprus, had been sanctioned by the United States and Ukraine before the handover.

The October 2025 transfer, timed to the EU sanctioning, exposes a gap hull detention cannot close: the operating network sits behind a beneficial owner regulators cannot identify.

The EU's 21st sanctions package, expected in late June or early July, targets shadow fleet management networks rather than hulls alone. Neither Drimas Chartering nor Queenship Ltd appears on current EU sanctions registers; that late-June window is the first place to watch for either name.

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