The Mark 32 has been the standard anti-submarine torpedo launching system aboard United States Navy surface vessels since its introduction in 1960, and is in use aboard the warships of several other navies. and
Mark 54 designs, and can be modified to use other torpedoes (such as the
MU90 Impact aboard
Royal Australian Navy frigates, or
Royal Navy units using
Sting Ray torpedoes). The tubes are designed to be fired remotely, but manual firing controls are fitted as a backup to all but the s Mod 15 sets, as all aspects of the tubes' operation are controlled remotely. The launch is powered by compressed air in a rear flask, which doubles as each tube's
breech, and the torpedoes are
fire-and-forget weapons. The launcher can be made from
fibreglass, or with a fibreglass liner encased in metal. The tubes were designed to be weatherproof and capable of storing torpedoes for long periods, but this is only practical with regular maintenance. Each triple-tube set weighs around unloaded, with variations between mods. == Variants ==