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34 | Operation

The actual depth reading is shown on the display.

Steer the boat to the depth you want to track and in the

direction of the depth contour (main course). When the

wanted depth is shown in the display, activate the depth

contour steering with the

or softkey (any of the

two). Use the

key when it is shallow to port or the

key when it is shallow to starboard.

Main course

This should be the main (average) direction of the depth

contour you want to follow. If the contour line is making

a big change in direction, you should manually adjust the

set course to the new direction. This will result in a

quicker response from the autopilot. If the course is not

adjusted, the autopilot will need more time to turn and

steer the boat back to the reference depth.

The sub screen has the following adjustments:

Depth gain

The autopilot is tracking the depth by computing an x-

track error when the boat is off the reference depth. This

error automatically adjusts the set course to bring the

boat back on track.

Use the gain control to have a firm or smooth response to

the variation in depth.

Simrad AP28 User Manual

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