Naval mine ship, HMHS "Britannic", which was the sister ship of the RMS "Titanic." During World War II, the U-boat fleet, which dominated much of the battle of the Atlantic, was small at the beginning of the war and much of the early action by German forces involved mining convoy routes and ports around Britain. German submarines also operated in the Mediterranean Sea, in the Caribbean Sea, and along the U.S. coast. Initially, contact mines (requiring a ship to physically strike a mine to detonate it) were employed, usually tethered at the end of a cable just below the surface of the
Titanic (1943 film) passenger liner which eventually shared "Titanic"s fate; it was sunk a few days before the end of World War II by the Royal Air Force on May 3, 1945, with loss of life more than three times than that on the actual "Titanic". The ship had been turned into a prison ship and filled with Jewish inmates that the Nazis had put there in hopes that the ship would be destroyed by the British. The scenes with the lifeboats were also filmed on the Baltic Sea; some of the interior scenes were shot in Tobis Studios. "Titanic" endured many production