Supercavitating Underwater Running Body, formerly known as Barracuda) was a German close-range supercavitating torpedo technology demonstrator[1] designed by the Diehl BGT Defence (now Diehl Defence) and developed in cooperation with the German Navy.

The supercavitating torpedo for a "close-range defense of underwater targets"[1] was presented to the public in 2005 as a prototype, but it never went into development and procurement.

Guidance is based on an inertial measurement unit (IMU)[1] and a sonar antenna array integrated into the structure of the cavitation-forming conical tip located in the head section of the torpedo.

To maintain the integrity of the bubble in response to increasing water pressure, the torpedo begins to pump a greater volume of gas.

[citation needed] According to the manufacturer, the torpedo reaches a speed of over 400 km/h (250 mph; 220 kn) underwater.