Mark 39 torpedo

The Mark 39 torpedo was the first homing torpedo in United States Navy service to use a trailing wire for mid-course guidance through the submarine's fire control system. In 1946, shortly after the Mark 37 Mod 0 had been prototyped, the wire guidance system was reverse-engineered from the G7ef(TX) "Spinne" following the arrival of technical documentation from Germany. This resulted in the development of a wire-guided prototype the same year. 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 inventory was scrapped.

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1946 — 1956  Wikidata
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Frameless

Type	Subtype	Date	Description	Notes	Source