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USS Harder (SS-568), a Tang-class submarine, was the second ship of the United States Navy to be named for the harder, a fish of the mullet family found off South Africa. Construction and commissioning
USS Harder (SS-568) with the three distinctive shark-fin PUFFS domes Fin and central section of HMAS Onslow. The three orange covers on the casing are protective sheathes over the submarine's Micropuffs sonar. Passive Underwater Fire Control Feasibility System (or Study) (PUFFS) is a passive sonar system for submarines.
Isoshio was laid down at Kawasaki Heavy Industries Kobe Shipyard on 9 July 1970 and launched on 18 March 1972. She was commissioned on 25 November 1972, into the 1st Submarine Group.
In confined spaces, common in urban warfare, even the operators themselves may be at risk due to deflection of backblast by walls or sturdier civilian vehicles behind them. Soft launch methods diminish backblast by ejecting the projectile some distance before its main rocket motor ignites. Backblast can also be reduced by adding a countermass ...
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The Uzushio-class submarine was a series of seven submarines in service with Japanese Maritime Self Defense Force during the Cold War between 1972 and the mid-1990s. They were the first generation of the teardrop type submarine that valued the underwater performance against that of the preceding conventional-hull type Asashio class.
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