An underwater ROV is a robotic vehicle that can go from the water surface to deep oceans and is used to observe and complete tasks by the ROV user. You can usually spot an ROV because of its design; they have multiple propeller thrusters pointing in various directions. The configuration of the thrusters allow the ROV to be controlled to stay in a fixed position which allows it to visually inspect or to carry out work using its gripper. Underwater ROVs also have a tether (an electrical cable) that connects them to the surface or wherever the control station is located.