Marine Security Bulletin: 15/2026 - Security incident in the Gulf of Finland

Deputy Commissi of Maritime Affairs

July 2026

MARINE SECURITY BULLETIN – 15/2026

Dear Shipowners, Operators and Masters Subject: Security incident in the Gulf of Finland

On 6 July 2026, a drone attack on the port of Vysotsk, Russia in the Gulf of Finland caused damage to an oil tanker berthed in the port. No crew members have been reported injured. The vessel has reported damage to the starboard side of the vessel and will continue to their next port of call to further assess damages and undergo repairs.

Operators and Masters should ensure that any planned operations or voyages do not take the vessel into any area, or engage in any activity, that would expose her to the risk of ongoing military operations. Vessels operating in this area may encounter GPS interference, AIS spoofing, and/or other communications jamming. Vessels should ensure they are broadcasting on AIS (except when the Master believes that continuing to operate AIS might compromise the safety or security of the ship or when a security incident is imminent) and monitor VHF Channel 16.

Recommendations

Ships Masters should obtain the relevant NAVAREA warnings and contact the local port authorities and ships agents for additional information. Ships navigating in these areas should also monitor NAVTEX messages, maintain a proper lookout for suspicious drifting objects and report immediately to ships and coast radio stations in the area with position and direction and speed of wind and current.

This is a dynamic situation, and changes may occur at any time. Owners, Operators, Company Security Officers and Masters are suggested monitoring the developments and to liaise closely with local port agents and P&I correspondents for the latest information on facility conditions, dangerous sea areas and temporary port closures and navigational restrictions.

Operators and Masters should complete a Risk Assessment prior to entering the Gulf of Finland area. In the event of any incident or suspicious activity, Liberian flagged vessels should activate the Ship Security Alert System (SSAS) immediately and notify the Liberian Security Department.

Contact Information

Please keep LISCR’s Security Department informed of any security incidents at: Office of the Senior Deputy Commissioner of Maritime Affairs

Republic of Liberia

22980 Indian Creek Drive, Suite 200 Dulles, Virginia 20166 USA

D: +1 571 495 5944 / O: +1 703 790 3434 / F: +1 703 790 5655 Email: Security@liscr.com www.liscr.com

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