The Bliss-Leavitt Mark 6 torpedo was a Bliss-Leavitt torpedo developed and produced by the E. W. Bliss Company in 1911. It employed a main engine that was a horizontal turbine rather than the vertical turbine used on all other Bliss-Leavitt torpedoes. The Mark 6's depth and gyro controls were also combined into one integrated unit. About 100 units were manufactured by E.W. Bliss. The Mark 6 and all other torpedoes designed before Bliss-Leavitt Mark 7 torpedo, were considered obsolete and withdrawn from service in 1922.