Simrad AP25 - Manual (Page 29)

Operation
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Zigzag-turns
A zigzag turn pattern is also available when in AUTO mode.
The user decides whether the first turn should be made to Port or
Starboard.
Ensure that the zigzag-turn pattern has been selected under the
User Set-up 2 menu. Refer to Turn Pattern select on page 55.
To enter zigzag turn mode:
Press of the TURN/DODGE button repeatedly until ZIGZAG
is flashing in the display.
Boat turning starboard
The course change can be set before the turn is
initiated. (Range: 2-70°).
The AP25 will continue on the set course until you
press either the PORT or STBD button to select the
direction in which to make the first course change. If
you do not press PORT or STBD within 1 minute, the
autopilot will return to AUTO mode and stay on
course.
While sailing in a zigzag pattern you can alter the
course change (4-140°), time on the leg (1-20 min.),
and the set course. An arrow shows the direction of
the course change.
Main course
Course change 40°
Initial course change 20°
Time on leg
To exit zigzag-turn mode, press any of the mode buttons. When
pressing the AUTO button, the new set course is shown in the
upper portion of the display.