Mark 39 torpedo

The Mark 39 was a Mark 27 Mod 4 torpedo converted for development of wire guidance techniques, which were eventually incorporated into the Mark 37 Mod 1 and the Mark 45. Due to this development, the Mark 39 was considered obsolete and the remaining.[2] The initial production run consisted of 120 Mark 27 torpedoes converted to Mark 39 by Philco, with initial field deployment circa 1956 on seven of the GUPPY attack submarines. A total of approximately 3000 Mark 39 torpedoes would be ultimately produced. In operation, the weapon was used as a "bearing rider", tracked using the launching submarine's passive sonar and thereby kept to a particular bearing; a form of MCLOS guidance.[3]

• Origin — United States • Type — ASW Homing torpedo[1] • Is Ranged — yes • Is Explosive — yes • Is Missile — yes • Service — 1946-1956 • Used By — United States Navy • Designer — Vitro Corporation Ordnance Research Laboratory, Pennsylvania State University • Manufacturer — Philco • Design Date — 1946 • Weight — 1275 pounds • Length — 133 inches • Diameter — 19 inches • Range — 13000 yards (26-minute search duration) • Filling — Mk 39 Mod 0, HBX • Filling Weight — 130 pounds • Detonation — Mk 19 Mod 10 contact exploder • Engine — Electric • Speed — 15.5 knots • Guidance — Wire • Launch Platform — Submarines