Warning: In wind mode the autopilot steers to the apparent or true wind
angle and not to a compass heading. Any wind shift could result in the
vessel steering on an undesired course.
Tacking in WIND mode
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Note: The tack function in WIND mode is only available when the system is set up for
boat type SAIL in the Autopilot Commissioning dialog and is not available for NAC-1 or
AC70 autopilot computers.
Tacking in Wind mode can be performed when sailing with apparent or true wind as the
reference. In either case the true wind angle must be less than 90 degrees.
The tacking/gybing operation will mirror the set wind angle on the opposite tack.
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Note: Tacking should be tried out in calm sea conditions with light wind to find out how
it works on your boat. Due to a wide range of boat characteristics (from cruising to racing
boats) the performance of the tack function may vary from boat to boat.
The rate of turn during the tack will be given by the Tack time defined in the sailing
parameter setup. The tack time is also controlled by the speed of the boat to prevent loss of
speed during a tack.
You can initiate the tack function from WIND mode.
When you initiate the tacking, the autopilot immediately mirrors the set wind angle to the
opposite side of the bow.
You can interrupt the tack operation by selecting standby, re-engaging Wind mode, or
engaging heading hold or no drift.
Gybing
Gybing is possible when the true wind angle is larger than 120°.
The time to make a gybe is determined by the speed of the boat to make it as quick as
possible within control.
Turn pattern steering
The autopilot includes a number of automatic turn steering features when the autopilot is in
Heading hold mode.
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Note: The turn steering option is not available if the boat type is set to SAIL in the
Autopilot Commissioning dialog, instead the tack/gybe feature is implemented.
Initiating a turn
You start the turn by selecting the relevant turn icon, followed by selecting the port or
starboard options in the turn dialog to select the turn direction.
Stopping the turn
You can stop the turn in the turn page of the Autopilot controller.
At any time during a turn you can select Standby in the Autopilot controller or Autopilot
standby in the System controls dialog to return to Standby mode and manual steering.
You can also stop a turn by pressing a physical standby key to return to Standby mode and
manual steering.
Turn variables
The turn steering options, except the U-turn, have settings that you can adjust before you
start a turn and some can be adjusted when the boat is in a turn.
U-turn
U-Turn changes the current set heading to be 180° in the opposite direction.
The turn rate is identical to Rate limit settings. This cannot be changed during the turn.
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Note: Refer to the separate NSO evo3 Installation manual for information about Rate
limit settings.
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Autopilot | NSO evo3 Operator Manual
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