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Operation
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2.11 Navigating with the AP20
The AP20 has the capability to use steering information from an
external navigator (GPS, Chart Plotter) to direct the boat to a
specific waypoint location, or through a route of waypoints. In
the NAV mode, the AP20 uses the heading sensor as it's
reference for course keeping. The steering information received
from the external navigator alters the set course to direct the
AP20 to the destination waypoint.
Note ! Navigational steering must only be used in open waters. The
process of having an external navigation receiver direct an
autopilot can be a slow acting process. By selecting the NAV
mode, the AP20 is set for automatic steering on the current set
course and then waits for the user to accept the course change to
the destination waypoint.
To obtain satisfactory navigation steering, the following points
must be fulfilled prior to entering the NAV mode:
The AP20 autosteering must be tested and found satisfactory.
The navigation receiver must be operating and the navigation
system (GPS, Chart Plotter) must be in full operating mode
with adequate signal characteristics for valid position and
steering data.
At least one waypoint must be entered and selected as the
current waypoint in the navigation receiver.
The navigation source in the AP20 USER SETUP menu must
be set for the navigator that contains the current waypoint.
The AP20 is designed to steer in “mixed mode” operation. This
combines the straight steering capability of cross track error
(XTE) steering in conjunction with the turning capability of
bearing mode steering (Course To Steer, CTS).
RFC
HEADING
WP Egersund
Brg.
Chg.
OK ? Press NAV
o
o
350
NAV
SETUP
Press
to activate prompt display
340
LOG -HI
RUDDER
P
S
00
23


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