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Possible Answers: ASTOR.
Random information on the term “ASTOR”:
The Mark 45 anti-submarine torpedo, a.k.a. ASTOR, was a submarine-launched wire-guided nuclear torpedo designed by the United States Navy for use against high-speed, deep-diving, enemy submarines. The 19-inch (480 mm)-diameter torpedo was fitted with a W34 nuclear warhead. The need to maintain direct control over the warhead meant that a wire connection had to be maintained between the torpedo and submarine until detonation. Wire guidance systems were piggybacked onto this cable, and the torpedo had no homing capability. The design was completed in 1960, and 600 torpedoes were built between 1963 and 1976, when ASTOR was replaced by the Mark 48 torpedo.
This electrically propelled, 19-inch (480 mm)-diameter torpedo was 227 inches (5,800 mm) long and weighed 2,400 pounds (1,100 kg). The W34 nuclear warhead used in ASTOR had an explosive yield of 11 kilotons. The requirement for positive control of nuclear warheads meant that ASTOR could only be detonated by a deliberate signal from the firing submarine, which necessitated a wire link. Because of this, the torpedo was only fitted with wire guidance systems (transmitted over the same link), and had no homing capability. The torpedo had a range of 5 to 8 miles (8.0 to 12.9 km). By replacing the nuclear warhead and removing the wire guidance systems, the torpedo could be reconfigured for unguided launch against surface targets.