Simrad AP25 - Manual (Page 107)

Configuration and setup
20221495F
105
Drive engage
This determines the use of the
autopilot computer drive
engage port (BYPASS/
CLUTCH terminals). The port
voltage is the same as the
selected drive unit voltage.
Drive engage has the following
settings:
Bypass/clutch:
The port will activate (go high), in all autopilot steering modes,
and typically engages a bypass valve on a hydraulic linear drive
or a clutch on a mechanical drive when entering any of the active
autopilot modes. This is the default setting and it allows you to
steer the boat with the helm or wheel when in STBY or DODGE
modes.
Auto:
This setting is implemented for future use. Always use the
“Bypass/clutch” (default) setting.
Rudder Deadband
The rudder deadband function
is adaptive and is continuously
operative. It prevents the
rudder from hunting and the
adaptive function optimizes the
deadband to the speed of the
boat and the pressure on the
rudder.
If the auto-setting does not perform properly due to high inertia
from the wheel or a loose steering gear, it can be adjusted
manually.
Adjust the Rudder deadband by rotating the course knob. Find
the lowest possible value that will prevent the rudder from
hunting. A wide deadband will cause inaccurate steering. It is
recommended to check rudder stability and accuracy in FU-
mode when the boat is moving to get pressure on the rudder.