SUT torpedo

The SUT Mod 2 has been compared favorably to the Chinese Yu-4 and Yu-6.[3]

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.[6]

The SUT was the first torpedo fired by the Kalvari-class submarine because of a lack of procurement of planned heavyweight torpedoes.[2] A planned purchase of Black Shark torpedoes fell through because their manufacturer Finmeccanica was blacklisted by the Indian government for procurement corruption.[7]

The SUT was originally procured along with the two Hai Lung-class submarines.[8] On September 4, 2003 a war shot SUT fired by a submarine during the Hankuang No. 19 training exercise broke its control wires and went out of control. The torpedo was recovered four hours later from a Yilan County beach. Representatives of the manufacturer traveled to Taiwan to participate in the incident investigation.[9] On October 8th the Navy tested a second torpedo with satisfactory results. On October 14th the Navy held a full test in Pingtung County, the first torpedo experienced similar problems to the one on September 4th but the issue was resolved and a second torpedo successfully destroyed the target, a decommissioned Yang-class destroyer.[10]

In 2010 the Taiwanese Navy offered a reward to local fishermen for the recovery of a training SUT lost during an exercise.[11] The SUT will be replaced by the Mk 48 torpedo in Taiwanese service.[12]