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The Mark 46 torpedo is the backbone of the United States Navy's lightweight anti-submarine warfare torpedo inventory, and is the current NATO standard. These aerial torpedoes are designed to attack high-performance submarines, and current variants, such as the Mark 46 Mod 5, are expected to remain in service until the year 2015. In 1989, a major upgrade program for the Mod 5 began to improve its shallow-water performance, resulting in the Mod 5A and Mod 5A(S). ==Design details== ;Mark 46, Mod 5 * Primary Function: Air and ship-launched lightweight torpedo〔Thomas, Vincent C. ''The Almanac of Seapower 1987'' Navy League of the United States (1987) ISBN 0-9610724-8-2 pp.190-191〕 * Contractor: Alliant Techsystems * Power Plant: Two-speed, reciprocating external combustion; Mono-propellant (Otto fuel II) * Length: 8 ft 6 in (2.59 m) tube launch configuration (from ship),〔Polmar, Norman "The Ships and Aircraft of the U.S. Fleet: Torpedoes" ''United States Naval Institute Proceedings'' November 1978 p.160〕 14 ft 9 in (4.5 m) with ASROC rocket booster〔 * Weight: 508 lb (231 kg)〔 (warshot configuration) * Diameter: 12.75 in (324 mm)〔 * Range: 12,000 yd (11 km)〔 * Depth: > 1,200 ft (365 m) * Speed: > 40 knots (46 mph, 74 km/h)〔 * Guidance System: Homing mode: Active or * Launch/search mode: Snake or circle search * Warhead: 96.8 lb (44 kg)〔 of PBXN-103 high explosive (bulk charge) * Date Deployed: 1967 (Mod 0);〔 1979 (Mod 5) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mark 46 torpedo」の詳細全文を読む スポンサード リンク
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