Autonomous underwater vehicle

The Blackghost AUV is designed to undertake an underwater assault course autonomously with no outside control.

Pluto Plus AUV for underwater mine identification and destruction. From Norwegian minehunter KNM Hinnøy

An autonomous underwater vehicle (AUV) is a robot that travels underwater without requiring continuous input from an operator. AUVs constitute part of a larger group of undersea systems known as unmanned underwater vehicles, a classification that includes non-autonomous remotely operated underwater vehicles (ROVs) – controlled and powered from the surface by an operator/pilot via an umbilical or using remote control. In military applications an AUV is more often referred to as an unmanned undersea vehicle (UUV). Underwater gliders are a subclass of AUVs.