Raymarine St290 - Page 288

8-4-18 Section 8: Autopilots
ST290 Instrument System Owner’s Handbook
• If the rudder gain is adjusted correctly, the 40° course change
should result in a crisp turn followed by an overshoot of no more
than 5°.
• If the rudder gain setting is too high, the 40° course change will
result in a distinct overshoot of more than 5° andtheremaybea
distinct ‘S’ in the course (see
A in Figure 4-10 ).
Correct this oversteer by reducing the rudder gain setting.
• If the rudder gain is too low, the boat’s performance will be slug-
gish. It will take a long time to make the 40° turn and there will be
no overshoot (see
B in Figure 4-10 ).
Correct this understeer by increasing the rudder gain setting.
If you need to adjust the rudder gain:
4. Press
AUTO to check the autopilot performance in Auto mode.
Figure 4-10:Rudder gain settings
1. Access Pilot Advanced Calibration
andusethe buttontoscrolltothe
RUDDER GAIN screen.
2. Use the or button to adjust the
rudder gain.
3. To save the setting change, press the
button.
D5989-1
New
heading
New
heading
A
New
heading
B
Correct
rudder gain
Rudder gain
too high
Rudder gain
too low
D3262-2
81183_2 S8.book Page 18 Tuesday, May 6, 2003 9:08 AM