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108 ST4000+ Wheel & Tiller Autopilots: Owner’s Handbook
7 Customizing the ST4000+
Calibration lock (CAL LOCK)
Calibration lock controls whether it is possible to access User setup or
display the software version. It is intended for charter boat users.
Pilot type (4000 WHL/TILL)
Retain the default setting of 4000 WHL for wheel drive systems, and
4000 TILL for tiller pilots.
Rudder gain (RUDD GAIN)
This is the permanent power-on rudder gain setting. Follow the
procedure on page 96 to adjust this value to the setting that gives the
best steering performance. You can make temporary changes to this
rudder gain value during normal operation (see page 13).
Response level (RESPONSE)
This is the permanent power-on response setting. You can make
temporary changes to this response level setting during normal
operation (see page 12).
Turn limit (TURN RATE)
This limits your boat’s rate of turn under autopilot control. The value
must be within the range 5° to 40°.
Rudder alignment (ALIGN RUD)
Set this option if you have connected a rudder position sensor to your
wheel pilot system:
1. Manually center the helm.
2. The rudder bar graph at the bottom of the screen indicates the
rudder angle as determined by rudder position sensor:
• adjust the offset, using the
-1 and +1 keys, until the rudder
bar graph shows the rudder position as central
Note: The offset must be within -7° to +7°. If the offset is too great to
adjust on screen, you will need to improve the alignment of the rudder
position sensor (see page 81) and then repeat steps 1 and 2.