A spoke is one of the wooden or metal handles projecting outward from the rim of a traditional ship's wheel. Helmsmen grip these extensions to apply leverage when turning the rudder against the heavy resistance of the water. On mechanical steering systems, the topmost spoke often features a distinct carving or wrapping to indicate when the rudder is perfectly centered.
Heard on the job
Keep that king spoke dead center until we clear the channel markers.
Insider tip
The main upright spoke when the rudder is amidships is called the king spoke, usually marked with a physical notch or a Turks head knot so the helmsman can feel it in the dark.