Operation Manual

Operation

20220505H 21

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

350

NAV

SETUP

Press

to activate prompt display

340

LOG -HI

RUDDER