The German armored cruiser S.M.S Prinz Adalbert under steam. Stationed in the Baltic Sea, Prinz Adalbert had run aground on January 24, 1915, and been torpedoed by the British submarine E.9 on July 2. On October 23 submarine E.8 torpedoed the battleship setting off an explosion in a magazine. Only three survived.
S.M.S Prinz AdalbertReverse:Message datelined March 30, 1907, Ostsee, the Baltic Sea.
"Goodhart in E.8 scored one of the more spectacular successes of the submarine campaign while operating off Libau on 23 October [1915]. He encountered the recently repaired armored cruiser Prinz Adalbert escorted by two destroyers and torpedoed her. One of the cruiser's magazines exploded, and there were only three survivors. It was the heaviest loss of the war for the German Baltic forces."
Responding to a Russian request for aid in the Baltic Sea, Great Britain dispatched two submarines, E.8 and E.13 on August 15, 1915. Only E.13, under the command of Lieutenant Commander F. H. J. Goodhart, made the dangerous passage from the North Sea through the Skaggerak and Kattegat, the straits between the neutral countries of Denmark, Norway, and Sweden. E.1 and E.8 had reached the Baltic in October 1914. By September 4, 1915, E.18 and E.19 did as well, giving Britain five submarines operating in the Sea. S.M.S Prinz Adalbert had run aground on January 24, and been torpedoed by E.9 on July 2.
A Naval History of World War I by Paul G. Halpern, page 203, copyright © 1994 by the United States Naval Institute, publisher: UCL Press, publication date: 1994
1915-10-23, 1915, October, submarine, Baltic, Baltic Sea