The apparatus by which a ship is steered, comprising rudder, tiller, wheel, etc.; -- commonly used of the tiller or wheel alone.
To steer; to guide; to direct.
The tiller. The entire steering gear of the the boat (the tiller, tiller extension, rudder and fittings). The directional control of a boat (eg 'she's very light on the helm' or 'she has quite a weather helm') The person steering the boat (see also Helmsman).