MV Sebastiano Veniero, formerly MV Jason, was a 6,310 GRT cargo and passenger motor ship that was built in Monfalcone, Italy in 1940. In 1941 she was requisitioned by Germany. On 9 December, 1941 she was damaged by a Royal Navy submarine in the Mediterranean Sea, killing at least 300 UK and Dominion prisoners of war, and possibly many more. She did not sink but was beached on the coast of the Peloponnese, where she was torpedoed again a week later and became a total loss.