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In 1967, the mod 0s started being refurbished as mod 3, and mod 1 as mod 2. These modifications involved many changes including replacement of magnetostrictive transducers with piezoelectric ones, and resulted in target acquisition range increased from 700 yd (640 m) to 1,000 yd (910 m) without loss of sensitivity with increasing depth.
Mark 37 Director c1944 with Mark 12 (rectangular antenna) and Mark 22 "orange peel" Ship gun fire-control systems (GFCS) are analogue fire-control systems that were used aboard naval warships prior to modern electronic computerized systems, to control targeting of guns against surface ships, aircraft, and shore targets, with either optical or radar sighting.
The Mark 3 was specifically designed for the Tennessee-class armored cruisers, numbered in order after the Mark 1 and Mark 2s, Nos. 27–47, with No. 27 being delivered in February 1906. Nos. 27–31, 36, and 45 were all Mod 0s, with Nos. 37–44, 46, and 47 being Mod 1s. The initial Mod 2s were Nos. 32–35, with other later converted to Mod 2.
Mark 27 Mod.0 US: 1943-1946: Submarine/ surface: Diameter:19 in (480 mm) Length:90 in (2.3 m) Weight:720 lb (330 kg) Mk.27 Mod.0: Electric, secondary battery: 12 kn (22 km/h) search for 12 minutes at 5,000 yd (4.6 km) Mark 27 Mod 4 US: 1943-1960: Submarine/ surface: Diameter:19 in (480 mm) Length:125.75 in (3.194 m) Weight:720 lb (330 kg) Mk.27 ...
Mark 1A Computer Mk 37 Director above the bridge of destroyer USS Cassin Young with AN/SPG-25 radar antenna. The Mark 1, and later the Mark 1A, Fire Control Computer was a component of the Mark 37 Gun Fire Control System deployed by the United States Navy during World War II and up to 1991 and possibly later.
There have been a number of 21-inch torpedoes in service with the United States. These have been used on ships and submarines of the U.S. Navy.American 21-inch torpedoes are 533 millimeters (21 in) in diameter.
The weapon was produced in two models; the enhanced radiation (ERW) W79 Mod 0 and fission-only W79 Mod 1. Both were plutonium -based linear-implosion nuclear weapons . The Mod 0 was a variable yield device with three yields, ranging from 100 tons of TNT (420 GJ ) up to 1.1 kt (4.6 TJ ) and an enhanced- radiation mode which could be turned on or off
These included the Mark 14, Mark 23, Mark 32, Mark 34, Mark 37, Mark 44, and Mark 46. Additionally, US Navy rocket-boosted torpedo systems were imported, such as the ASROC and VL-ASROC . [ 2 ] This page presently only lists weapons which were indigenously produced in Japan, including both original designs and locally manufactured foreign designs.