# Mark 32 Surface Vessel Torpedo Tubes

Mark 32 Surface Vessel Torpedo Tubes (Mk 32 SVTT) is a torpedo launching system designed for the United States Navy.

## History

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.
During the FRAM Program, Fletcher, Allen M. Sumner and Gearing-class destroyers were modernized and fitted with two Mark 32 torpedo tubes on each side of their midship. The torpedo tubes' service extended to multiple other countries such as Mexico, South Korea, Taiwan, Turkey, Egypt and many more due to the fact that decommissioned American ships were bought or transferred over to them throughout the years, notably Oliver Hazard Perry-class frigates.
Japan uses the HOS-301 torpedo tubes which are redesignated version of the Mark 32.

### Design

Most versions (referred to as modifications or mods) are triple-tube sets that can be rotated or trained to face a target. The exception is the Mod 9 sets, which only have two tubes and are fixed in position. The Mark 32 can fire 12.75-inch (324 mm) torpedoes of the Mark 44, Mark 46, Mark 50 (from the Mod 17 tubes onwards), 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 Spruance-class destroyer'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 2,230 pounds (1,010 kg) unloaded, with variations between mods.

### On board ships
#### United States

* Fletcher-class destroyer
* Allen M. Sumner-class destroyer
* Gearing-class destroyer
* Mitscher-class destroyer
* Forrest Sherman-class destroyer
* Farragut-class destroyer
* Charles F. Adams-class destroyer
* Spruance-class destroyer
* Kidd-class destroyer
* Arleigh Burke-class destroyer
* Claud Jones-class destroyer escort
* Knox-class frigate
* Oliver Hazard Perry-class frigate
* Long Beach-class cruiser
* Leahy-class cruiser
* Bainbridge-class cruiser
* Belknap-class cruiser
* Truxtun-class cruiser
* California-class cruiser
* Virginia-class cruiser
* Ticonderoga-class cruiser
* Hamilton-class cutter
* Treasury-class cutter

#### Japan

* Tachikaze-class destroyer
* Hatakaze-class destroyer
* Ayanami-class destroyer
* Akizuki-class destroyer (1959)
* Yamagumo-class destroyer
* Takatsuki-class destroyer
* Minegumo-class destroyer
* Hatsuyuki-class destroyer
* Asagiri-class destroyer
* Murasame-class destroyer
* Takanami-class destroyer
* Kongō-class destroyer
* Atago-class destroyer
* Maya-class destroyer
* Akizuki-class destroyer (2010)
* Asahi-class destroyer
* Isuzu-class destroyer escort
* Chikugo-class destroyer escort
* Ishikari-class destroyer escort
* Yūbari-class destroyer escort
* Abukuma-class destroyer escort
* Kashima-class training ship
* Asuka-class experimental ship

#### Canada

* St. Laurent-class destroyer
* Restigouche-class destroyer
* Mackenzie-class destroyer
* Annapolis-class destroyer
* Iroquois-class destroyer
* Halifax-class frigate

#### Taiwan

* Kee Lung-class destroyer
* Chi Yang-class frigate
* Cheng Kung-class frigate

#### Italy

* Audace-class destroyer
* Durand de la Penne-class destroyer
* Centauro-class frigate
* Bergamini-class frigate
* Alpino-class frigate
* Lupo-class frigate
* Maestrale-class frigate
* Albatros-class corvette

#### Australia

* Perth-class destroyer
* Hobart-class destroyer
* Anzac-class frigate

#### South Korea

* Ulsan-class frigate
* Donghae-class corvette
* Pohang-class corvette
* Gwanggaeto the Great-class destroyer
* Chungmugong Yi Sun-sin-class destroyer
* Sejong the Great-class destroyer
* Incheon-class frigate
* Daegu-class frigate

#### Indonesia

* Claud Jones-class destroyer escort
* Ahmad Yani-class frigate
* Fatahillah-class corvette