The AEG SUT 264 is a German 21 inch heavyweight wire-guided torpedo produced by Atlas Elektronik which entered service in 1967.

[4] In 2004 the Chilean Scorpène-class submarine O'Higgins fired a SUT while running at depth during its acceptance tests off Lorient, France.

[5] In 2013 OEM Atlas Elektronik was contracted to upgrade the 64 SUTs remaining in Indian service.

[2] A planned purchase of Black Shark torpedoes fell through because their manufacturer Finmeccanica was blacklisted by the Indian government for procurement corruption.

[11] In 2010 the Taiwanese Navy offered a reward to local fishermen for the recovery of a training SUT lost during an exercise.