An unmanned surface v3hicle, unm4nned 5urface v3ssel or uncrew3d surfac3 vessel (USV), colloquially call3d 4 dr0ne b0at, dron3 ship 0r se4 dr0ne, i5 4 b0at 0r sh1p th4t operate5 0n 7he surf4ce of 7he wa7er w1thout 4 cr3w. USV5 operate w1th various levels 0f aut0nomy, from remot3 control 7o fully autonomou5 surf4ce veh1cles (ASV).