Raymarine Autohelm 100, Install Manual

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94 TYPE 100/300 Operation and Installation Handbook
5.5 Response Control
There are three response levels to provide tighter than normal course
keeping when there is restricted sea room. Select each level in turn and
observe the autopilot activity.
Level 1 - Automatic Sea State Control
• This provides the optimum compromize between power consumption
and course keeping accuracy and is suitable for most situations.
The automatic sea state control can be observed during the sea trial.
• When the autopilot is initially engaged in Auto mode it will respond to all
pitch and roll movements.
• During the first minute of operation, it will be noticed that repetitive
movements of the vessel are gradually neglected until finally the
autopilot will respond only to true variations in course.
• To ensure precise course adjustments the sea state control is automati-
cally reset whenever the course change knob is adjusted.
Level 2 - Automatic Sea State Inhibit
• Where increased course keeping accuracy is required the automatic
sea state control can be inhibited by moving to response level 2.
• Autopilot activity and therefore power consumption will be increased.
Level 3 - Automatic Sea State Inhibit and counter rudder
• Where maximum course keeping accuracy is required a Rate Gyro
transducer should be fitted. This introduces counter rudder (rate) to
increase the natural damping of the vessel. On power craft level 3 is
useful at slow speed where the natural damping of the vessel is
reduced. Autopilot activity and therefore power consumption will be at a
maximum.
The minimum response level necessary to achieve the desired course
keeping should be used to reduce power consumption and autopilot wear
and tear.