On 15 May 2025, Sjöfartsverket issued a series of NAVTEX navigational warnings covering Area 12 in Swedish Baltic Sea waters, including regions such as the Kalmar strait, Gotland, Norrköping, Möckeln, Bornholm, and Kalmarsund. These warnings highlight underwater survey and underwater operations ongoing in several specified coordinates, with areas temporarily restricted or hazardous to navigation. The operations involve cable-laying, survey activities, and instrument deployments at specified coordinates with detailed polygons delineating zones to be avoided or caution zones. The warnings span several days with repeated updates and instructions for vessels to navigate carefully or avoid designated areas to ensure safe passage. These operations potentially impact critical maritime transport hubs and infrastructure in the Baltic Sea region. No direct attribution of hostile intent or aggressive actions is indicated in the messages, but such underwater infrastructure operations are significant for maritime safety and security considerations.

On 15 May 2025, Sjöfartsverket issued a series of NAVTEX navigational warnings covering Area 12 in Swedish Baltic Sea waters, including regions such as the Kalmar strait, Gotland, Norrköping, Möckeln, Bornholm, and Kalmarsund. These warnings highlight underwater survey and underwater operations ongoing in several specified coordinates, with areas temporarily restricted or hazardous to navigation. The operations involve cable-laying, survey activities, and instrument deployments at specified coordinates with detailed polygons delineating zones to be avoided or caution zones. The warnings span several days with repeated updates and instructions for vessels to navigate carefully or avoid designated areas to ensure safe passage. These operations potentially impact critical maritime transport hubs and infrastructure in the Baltic Sea region. No direct attribution of hostile intent or aggressive actions is indicated in the messages, but such underwater infrastructure operations are significant for maritime safety and security considerations.