The hypothesis that Bugaled Breizh was sunk by an accident with a submarine can explain a number of unusual observations. The ship apparently sank very rapidly, there was no launching of any rescue boat, and the help signal was brief, without giving the coordinates. The trawler line of the ship was drawn out on the port side in contrast to the starboard one. The long cable is also reported to have traces of titanium; it has been proposed that this originates from the surface of a submarine.
