Unmanned underwater vehicle

Unmanned underwater vehicles (UUV), also known as underwater drones, or unmanned submarines, are submersible vehicles that can operate underwater without a human occupant, either remotely operated underwater vehicles (ROUVs) or autonomous underwater vehicles (AUVs). == Classifications == === Remotely operated underwater vehicle === Remotely operated underwater vehicles (ROUVs) primarily replace humans in difficult underwater conditions and perform educational or industrial missions.

Source: Wikipedia — Unmanned underwater vehicle (CC BY-SA 4.0)