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
HNoMS Glommen (1916) HNoMS Glommen (1916) The minelayer HNoMS "Glommen" was built for the Royal Norwegian Navy during World War I, as the lead ship of the two ship "Glommen" class of mine layers. Her sister ship was "Laugen". "Glommen" and her sister ship were kept in service until the German invasion of Norway in 1940. "Glommen" surrendered to the Germans on 14 April 1940, and was rebuilt as a floating anti-aircraft battery. She was scuttled at Kirkenes in 1944 by the retreating Germans. "Glommen" was built at Akers mekaniske verksted in Kristiania. She was named after the Glomma - the longest and