SM U-56
 SM U-56 was one of the 329 submarines serving in the Imperial German Navy in World War I.U-56 was engaged in the naval warfare and took part in the First Battle of the Atlantic.On November 2 1916 U-56 was attacked by gunfire from the Russian destroyer Grozovoi off Khorne Island Norway (near Vardö). U 56 was survived this attack. U-56 put the crew of the Norwegian merchant ship Ivanhoe ashore at 07:45 on November 3 at Lodsvik.