Simrad NSO evo3S MPU Operator's Manual page 93

Heading hold mode (A)
In this mode the autopilot steers the vessel on the set heading.
When the mode is activated, the autopilot selects the current compass heading as the set
heading.
Ú Note:
In this mode the autopilot does not compensate for any drifting caused by current
and/or wind (W).
W
To change the set heading
• Select a port or starboard button
An immediate heading change takes place. The heading is maintained until a new heading is
set.
Tacking in Heading hold mode
Ú Note:
Only available when the boat type is set to sail (autopilot configuration).
Ú Note:
Tacking should only be performed into the wind and must be tried out in calm sea
conditions with light wind to find out how it works on your vessel.
Tacking in heading hold mode changes the heading by a fixed tack angle, either to port or
starboard.
The rate of turn during the tack/gybe is set by the tack time in the autopilot settings dialog.
Refer to "Autopilot settings" on page 98.
To initiate a tack:
• Selecting the tack button in the mode list, then selecting the tack direction.
NoDrift mode
In NoDrift mode the vessel is steered along a calculated track line, from present position and
in a direction set by the user.
When the mode is activated, 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 steer along the calculated track.
Ú Note:
If the vessel is drifting away from the track line due to current and/or wind (W), the
W
vessel will follow the line with a crab angle.
To change the set track line
• Select a port or starboard button
NAV mode
Warning:
mode must not be used while sailing, as course changes may result in
unexpected tacks or gybes.
Prior to entering NAV mode you must be navigating a route or towards a waypoint.
In NAV mode the autopilot automatically steers the vessel to a specific waypoint location, or
along a pre-defined route. Position information is used to change the course to steer to keep
the vessel on the track line to the destination waypoint.
Ú Note:
For information about navigation, refer to "Navigating" on page 42.
NAV mode options
While in NAV mode the following buttons are available in the autopilot controller:
Restart
Restarts the navigation from the vessel's current position.
Autopilot| NSO evo3S MPU Operator Manual
NAV mode should only be used in open waters. Navigation
93