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unmanned surface vehicle (Alex_Odeychuk); unmanned surface vessel (An unmanned surface vehicle, unmanned surface vessel or uncrewed surface vessel (USV), colloqually called a drone boat, drone ship or sea drone, is a boat or ship that operates on the surface of the water without a crew. USVs operate with various levels of autonomy, from remote control[6] to fully autonomous surface vehicles (ASV).  wikipedia.org 'More) | |||