Checking rudder gain

To determine whether the rudder gain is set correctly, carry out the following test:
rudder gain

  1. Rudder gain too low

  2. Rudder gain too high

  3. Correct rudder gain

  1. Ensure you have set the autopilot response to level 5.
  2. Drive your vessel at a typical cruising speed in clear water.
    It is easier to recognize the steering response in calm sea conditions where wave action does not mask steering performance.
  3. Press AUTO to enter Auto mode, then alter course by 40°:

    • This course change should result in a crisp turn followed by an overshoot of no more than 5°, If the rudder gain is adjusted correctly.

    • If the course change causes a distinct overshoot (more than 5°) and/or there is a distinct ‘S’ in the course the rudder gain is too high.

    • If the vessel’s performance is sluggish and it takes a long time to make the 40° turn, with no overshoot the rudder gain is too low.

    If necessary, adjust the rudder gain.