Simrad AP70 Installation Manual download pdf (Page 23)

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The operational modes | AP70/AP80 Operator Manual

Immediate heading change

Set heading is adjusted by turning the rotary knob (press and rotate simultaneously if the Turn

Preset function is activated), or by pressing the PORT or STBD keys.

An immediate heading change will take place, also if the heading change is more than 180°.

The new heading will be maintained until a new heading is set.

Temporary course changes

If you need to avoid an obstacle when in AUTO mode, you can press the STBY key and

power steer or use the helm until the obstacle is passed.

If you re-press the AUTO key within 3 minutes you can select to continue on previous set

heading. If you don’t respond within 3 seconds the menu will disappear. The autopilot will go

to AUTO mode with current heading as set heading.

NoDrift

This mode the vessel is steered along a ﬁ ctive track line, from present position to inﬁ nity in

a direction set by the user. If the vessel is drifting away from the original course line due to

current and/or wind, the vessel will follow the line with a crab angle.

1. Steer the vessel onto the desired course

2. Press the AUTO key to activate NoDrift mode

- The autopilot will draw an invisible track line based on current heading from the vessel’s

position

The autopilot will now use the position information to calculate the cross track distance, and

automatically keep your track straight.

 Note: It is not possible to select NoDrift if position or heading information is missing.

The NoDrift mode info panel

A. Set CRS: Set course and Header repeater unit (True or Magnetic)

B. COG: Course over ground

C. SOG: Speed over ground

- If SOG is missing, the speed info will be taken from log (STW). Speed can also be set

manually from the Quick menu (MAN)

Changing set course

Set course is adjusted by using the rotary knob or the PORT/STBY keys.

• Turn the rotary knob (press and turn simultaneously if the Turn Preset function is activated)

- The course is changed with 1° for each step made by the knob

• Press the PORT or STBD key

- The course increment is set by the user, and can be 10, 5, 1 or 0.1° (default is 1°). See

“Setting the heading and course change increments” on page 22

An immediate course change will take place, also if the course change is more than 180°. The

new course will be maintained until a new course is set.

The Turn preset feature

The system includes a turn preset feature for AUTO and NoDrift mode. This allows for setting

the new heading/course, turn radius and turn type before the turn starts. The function gives

a more precise starting point for the turn, and it also avoids unintended heading/course

changes when accidentally turning the rotary knob.

 Note: The PORT and STBY keys will always give immediate action, also when turn preset

function is active.

Wind/

Current

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Simrad AP70 Installation Manual Page 23

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