[3] 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.

Most versions (referred to as modifications or mods) are triple-tube sets that can be rotated or trained to face a target.

[3] The launch is powered by compressed air[3] in a rear flask, which doubles as each tube's breech, and the torpedoes are fire-and-forget weapons.

[3] The tubes were designed to be weatherproof and capable of storing torpedoes for long periods, but this is only practical with regular maintenance.