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
RMS Titanic alternative theories his book, "Titanic: The Ship That Never Sank?". In it, Gardiner draws on several events and coincidences that occurred in the months, days, and hours leading up to the sinking of the "Titanic", and concludes that the ship that sank was in fact "Titanic"s sister ship , disguised as "Titanic", as an insurance scam by her owners, the International Mercantile Marine Group, controlled by American financier J.P. Morgan that had acquired the White Star Line in 1902. "Olympic" was the slightly older sister of "Titanic", built alongside the more famous vessel but launched in October 1910. Her exterior profile was