Operation | 37
Unlike when in Auto mode the autopilot will steer the
course unaffected by wind and current when the NoDrift
mode is engaged.
The course to steer to (bearing line) can be changed the
same way as when changing course in Auto mode.
NO-
DRIFT
• Compass heading: 345° M.
• Rudder Angle: 01 to starboard
• Speed: 12.8 kn from the log
• Steering parameter: LO-A
2.7 Navigating with the AP28
The AP28 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. The information received from the
navigator automatically changes the course to steer to
keep the boat on the track line and direct the AP28 to the
destination waypoint.
If the AP28 is connected to a navigation receiver that
does not transmit a message with bearing to next
waypoint, it will steer on Cross Track Error (XTE) only. In
that case you have to revert to AUTO mode at each
waypoint and manually change set course to equal
bearing to next waypoint and then select NAV mode
again.
To obtain satisfactory navigation steering, the following
points must be fulfilled prior to entering the NAV mode:
• The AP28 autosteering must be tested and determined
satisfactory
• The navigation receiver (GPS, Chart Plotter) must be
in full operating mode with adequate signal
characteristics for valid position and navigation data
• At least one waypoint must be entered and selected as
the current “Go to” waypoint
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