The steering wheel of a ship or boat is called the wheel, sometimes the trick wheel on ships with multiple steering systems. The propeller of the boat or ship is sometimes also called the wheel or screw.
A steering wheel on a sail boat is still called a steering wheel.
helm
Helm.
The "driving room" is appropriatly called the wheel house because that is where wheel is.
A paddle boat uses oars called paddles. Instead of a engine and steering wheel to move about on the water.
Of course they have wheels. but not 4 or 3 they have 1. And the wheel is to conduct the boat. so if you want to turn the boat to the right you turn the wheel to the right. and the wheel is setted in the wheelhouse. the wheel house is where the wheel is put.
A steering wheel would steer a boat, and a captain would be controlling the steering wheel.
defiantly the wheel
wheel or helm
The steering wheel on a yacht is called a 'helm'. There are different types of helms depending on the boat. Large yachts most commonly have wheels that are cable or hydraulic driven. Smaller yachts commonly have a 'tiller'. A tiller is still the helm, however instead of a wheel it is a lever attached directly to the rudder post or stock. A tiller is always moved opposite to the direction you intend to turn the boat. No matter the type, the person steering the boat is called the 'helmsman'.
It is either a ketch or a yawl. The ketch has the wheel stationed amidships (between the masts) & the yawl has the wheel stationed aft of the mizzen mast.
"Prop" or "screw" are two other commonly used terms. Also may be called a "Wheel".