USS Cobia (SS-245) was launched on November 28, 1943, by the Electric Boat Company of Groton, Connecticut. She is a fleet-type submarine (built to maintain speeds averaging 17 knots) of the Gato class. USS Cobia is he last thin-skin Gato type submarines to be built in the war. Soon after the completion of USS Cobia the Navy switched from the Gato design with its test depth of 300 feet to the newer improved Balao design with a test depth of 400 feet.
USS Cobia is in excellent condition and is now maintained as a submarine memorial by Manitowoc Maritime Museum.
Role of the Submarine in World War II
In the conflict against Japan in World War II, the role and importance of the submarine forces of the United States cannot be overestimated. American sub marines sank more than 600,000 tons of enemy warships and more than 5,000,000 tons of merchant shipping, thus destroying much of Japan's ocean commerce. This was accomplished by a force that never numbered more than two percent of naval personnel engaged in the war. The American submarine war against Japan created a blockade that denied her the oil, iron ore, food, and other raw materials she needed to continue to fight. By 1945 this submarine war made it Impossible for any Japanese ship to sail the ocean. Without this commerce and the raw materials it supplied to her war effort, Japan found it impossible to continue the war outside of the homeland. 
USS Cobia represents the U.S. submarine forces that fought against Japan in World War II for the following reasons:
Edwin P. Hoyt, Submarines at War--The History of the American Silent Service (New York: Stein and Day, 1983), pp. 297-98.
Richard H. O'Kane, Clear the Bridge (New York: Bantam Books, 1981), pp. 465-67.
Alden, John A. The Fleet Submarine in the U.S. Navy--A Design and Construction History. Annapolis, Maryland: Naval Institute Press, 1979.
Galli, Fred A. et al., Manitowoc Submarines. Manitowoc, Wisconsin: Manitowoc County Historical Society, 1968.
Hoyt, Edwin P. Submarines at War--The History of the American Silent Service. New York: Stein and Day, 1983.
Manitowoc Maritime Museum. The Submariner's Memorial. Manitowoc, Wisconsin: Manitowoc Maritime Museum, no date.
Middleton, Drew. Submarine--The Ultimate Naval Weapon-Its Past, Present and Future. Chicago, Illinois: Playboy Press, 1976.
O'Kane, Richard. Clear the Bridge. New. York: Bantam Books, 1981.
Roscoe, Theodore. United States Submarine Operations in World War II. Annapolis, Maryland: United States Naval Institute, 1965.
(click on the above photographs for a more detailed view)