On 23 November 2025, scuba divers off the coast of Pembrokeshire, Wales, discovered an object identified as a likely imploded Russian sonobuoy. The device was found approximately 50 metres underwater near the coast. A submarine expert expressed confidence that the recovered device is Russian in origin. Sonobuoys are underwater tracking devices used to monitor submarine activity. This find underlines continuing concerns about Russian underwater surveillance near UK waters. The discovery has raised questions about underwater security and monitoring around the region. Authorities are investigating the implications of such equipment being deployed near British territorial waters.

On 23 November 2025, scuba divers off the coast of Pembrokeshire, Wales, discovered an object identified as a likely imploded Russian sonobuoy. The device was found approximately 50 metres underwater near the coast. A submarine expert expressed confidence that the recovered device is Russian in origin. Sonobuoys are underwater tracking devices used to monitor submarine activity. This find underlines continuing concerns about Russian underwater surveillance near UK waters. The discovery has raised questions about underwater security and monitoring around the region. Authorities are investigating the implications of such equipment being deployed near British territorial waters.