Raymarine St290 - Step 2: Adjusting Autopilot Settings; Using Autolearn to Adjust Settings

8-4-14 Section 8: Autopilots
ST290 Instrument System Owner’s Handbook
Step 2: Adjusting autopilot settings
The next stage of the seatrialis to set important parameters that affect the
autopilot’s steering characteristics, i.e. rudder gain, counter rudder and
ruddertrim. The manner in which you adjust these depends on the type of
autopilot system you are using:
• 150G and 400G autopilot systems have an AutoLearn facility that
automatically adjusts these parameters, to suit your boat.
• If you are using a T150 or T400 (non-GyroPlus) autopilot, you will
need to adjust these parameters manually.
Note: For a full explanation of the parameters set during the AutoLearn,
and how to adjust them manually, refer to Manual setup on page 8-4-17.
Using AutoLearn to adjust settings
WARNING:
The AutoLearn process requires a significant amount of CLEAR
SEA SPACE in front of the boat. The autopilot will take the boat
through a number of zig-zag maneuversuntil it has acquiredenough
data. If you need to cancel the AutoLearn at any time, press the
STANDBY button to gain manual control of the boat.
Figure 4-8: AutoLearn maneuvers
If you are using a 150G or 400G autopilot system, use AutoLearn to set
rudder gain, counter rudder and rudder trim. Before commencing
AutoLearn, ensure that you have at least the amount of clear sea space
shown in Figure 4-8 .
At least 0.25 nm (500 m) of clear sea space
At least 0.04 nm (100 m)
of clear sea space
D5495-1
MINUTE
(approximately)
Wind
81183_2 S8.book Page 14 Tuesday, May 6, 2003 9:08 AM