Steering Quadrant

A sector-shaped fitting on a rudder stock that converts steering-cable movement into rudder rotation.

In a cable-and-quadrant system, wire or rope runs around the quadrant to the wheel steering mechanism. The quadrant’s radius provides leverage and determines cable travel for a given rudder angle.

Fastenings, key or clamp, cable tension, sheaves, end stops and emergency-steering access require inspection. A quadrant is not normally a toothed gear, although geared steering systems also exist.