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An underwater vehicle is a class of watercraft intended to operate in the underwater environment, including crewed submersibles and unmanned systems such as remotely operated vehicles (ROVs) and autonomous underwater vehicles (AUVs).
This article lists the types of underwater vehicle, with a brief description of each type. An underwater vehicle can be crewed or unmanned (which may be remotely operated or fully autonomous), and will generally, but not necessarily, have some form of onboard propulsion system.
