Ralph Waldo Christie was an admiral in the United States Navy who played a pivotal role in the development of torpedo technologies. During World War II, he commanded submarine operations out of the Australian ports of Brisbane and Fremantle.
Rear admiral Ralph W. Christie, USN
Captain Christie congratulates Lieutenant Commander John R. Moore, Commanding Officer of USS S-44 (SS-155), as he returned to this South Pacific base after a very successful week of patrol activity in August 1942.
A Mark 14 torpedo
The Mark 6 exploder was a United States Navy torpedo exploder developed in the 1920s. It was the standard exploder of the Navy's Mark 14 torpedo and Mark 15 torpedo.
Mark 6 exploder. This version apparently does not have a voltage regulator.
A failed 1926 test shot.
Defective, inadequately tested Mark 6 Mod 1 exploder used early in the war. In September 1943, it was replaced with the Mark 6 Mod 5.