Chapter 6: Adjusting Autopilot Settings 59
6 Adjusting Autopilot Settings
AutoTrim (tr LEv)
The AutoTrim setting determines the rate at which the autopilot
applies ‘standing helm’ to correct for trim changes caused by varying
wind loads on the sails or superstructure.
The default AutoTrim is set when commissioning the autopilot.
If you need to change the setting, increase the AutoTrim one level at a
time and use the lowest acceptable value:
• decrease the AutoTrim level if the autopilot gives unstable course
keeping or excessive drive activity with a change in the heel angle
• increase the AutoTrim level if the autopilot reacts slowly to a
heading change due to a change in the heel angle
• if the AutoTrim level is too high, the boat will be less stable and
snake around the desired course
Note: Type 150G/400G autopilots have a ‘FastTrim’ feature within
AutoTrim. Select
OFF to turn off FastTrim as well as AutoTrim.
Response level (rES)
This is the default autopilot response level. The response level
controls the relationship between course keeping accuracy and the
amount of helm/drive activity. You can make temporary changes to
response during normal operation.
Setting Effect
OFF No trim correction
1 Slow trim correction
2 Medium trim correction
3 Rapid trim correction
4 Very rapid trim correction
81013_4.book Page 59 Wednesday, July 25, 2001 11:04 AM
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