Simrad GO XSE Series, Operator'S Manual

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NAC-2/NAC-3 specific user settings
Autopilot
Switches the view to the last active page with the autopilot
controller open.
Steering
These options allow for manually changing low speed and high
speed parameters that were set during the commissioning of the
autopilot computer. For more details, refer to the separate
documentation for the autopilot computer.
Selecting the low speed option or the high speed option opens
dialogs the following parameters can be changed.
• Turn rate: Preferred turn rate used while turning in degrees per
minute.
• Rudder gain: This parameter determines the ratio between
commanded rudder and the heading error. The higher rudder
value the more rudder is applied. If the value is too small it will
take a long time to compensate for a heading error, and the
autopilot will fail to keep a steady course. If the value is set too
high the overshoot will increase and the steering will be
unstable.
• Counter rudder: Relation between change in heading error and
applied rudder. Higher counter rudder will reduce applied rudder
faster when approaching the set heading.
• Auto trim: Controls how aggressively the autopilot will apply
rudder to compensate for a constant heading offset, e.g. when
external forces such as wind or current affects the heading.
Lower auto trim will give faster, limitation of a constant heading
offset.
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Note:
In VRF mode this parameter controls the time constant of
the rudder estimate. A lower value makes the rudder estimate
Autopilot | GO XSE/XSR Operator Manual
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