Manual Simrad Robertson AP300X Marine Autopilot (page 110 of 132) (English)

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Robertson AP300X Autopilot

108 22081814H

• Too little Rudder and the autopilot fails to keep a steady course.

• Too much Rudder gives unstable steering and reduces speed.

• Low speed requires more rudder than high speed.

Counter Rudder is the parameter that counteracts the effect of the

boats turn rate and inertia. For a short time period it is superimposed

on the normal rudder response as provided by the Rudder parameter.

It may sometimes appear as if it tends to make the rudder move to the

wrong side (counter rudder).

The best way of checking the value of the Counter Rudder setting is

when making turns. The figures illustrate the effects off various

Counter Rudder settings.

Autotrim standard value is 40 which should work well on most boats.

On sailboats it may be preferable to set Autotrim to zero, to avoid

unwanted rudder offset when changing course

Rudder Limit should be kept at 20 degrees unless there is a need for

more rudder when performing dockside maneuvers.

Note ! In no event should the Rudder Limit be set to a value higher than the actual

maximum rudder angle.

Too little rudder

Too much rudder

Course to steer

New course

Counter rudder setting too low,

overshoot response

Counter rudder setting too high,

sluggish and creeping response

Correct setting of counter

rudder, ideal response

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Simrad Robertson AP300X Marine Autopilot Manual

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