VA-111 Shkval torpedo

The Shkval ("squall") is a high-speed supercavitating rocket-propelled torpedo designed to be a rapid-reaction defense against U.S. submarines undetected by sonar. It can also be used as a countermeasure to an incoming torpedo, forcing the hostile projectile to abruptly change course and possibly break its guidance wires.

The torpedo has a nearly flat, conical disk at its nose that creates the gas cavity for supercavitation. The disk tilts to help guide the weapon and keep it...