The wheel of a ship is the modern method of changing the angle of the rudder to change the direction of the boat or ship. It is also called the helm, together with the rest of the steering mechanism.
The wheel is typically connected to a mechanical or hydraulic system.
The idea of tractors, automobiles, and similar land vehicles having a steering wheel probably evolved directly from the ship's wheel.
At the helm - on the frigate Grand Turk
Wheel of the brigantine La Belle Poule
Wheel of the submarine Nautilus in Twenty Thousand Leagues Under the Sea
Wheelstand, USNS Passumpsic.