|Mark 39 torpedo|
|Place of origin||United States|
|Used by||United States Navy|
Ordnance Research Laboratory, Pennsylvania State University
|Effective range||1300 yards|
(26-minute search duration)
|Warhead||Mk 39 Mod 0, HBX|
|Warhead weight||130 pounds|
|Mk 19 Mod 10 contact exploder|
The Mark 39 torpedo was the first homing torpedo in United States Navy service to utilize a trailing wire for mid-course guidance through the submarine's fire control system. The Mark 39 was actually 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 inventory was scrapped.
- Jolie, E.W. (15 September 1978). "A Brief History of US Navy Torpedo Development: Torpedo Mine Mk39". http://www.hnsa.org/doc/jolie/part2.htm. Retrieved 21 June 2013.
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