Mark 26 torpedo
The Mark 26 torpedo was a submarine-launched anti-surface ship torpedo designed by Westinghouse Electric in 1944 as an improved version of the Mark 28 torpedo.
The Mark 26 was first to use Bell [Telephone Laboratories]' seawater battery, an explosive impulse start gyro and an electric steering and depth control. Production of the Mark 26 was deferred in favor of the Mark [16 torpedo].