SOLAS states that the system must be capable of 35 degrees on one side to 35 degrees on the other side, at its deepest seagoing draught and running at maximum ahead service speed. It may happen that the maximum angle reached by the rudder is less or the rudder is overshooting the 35-degree angle limit. One of the main reasons for this problem is a malfunction of the limit switch fitted on the repeat back unit or on the auto pilot. Replace the malfunctioned limit switch or adjust the limit switch to the correct maximum rudder angle limit.