B&G Zeus2 series Operator'S Manual Download Page 58

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If the sails are unbalanced when beating, yaw forces from the sails can drive the boat into the
wind. If the boat is driven beyond the set minimum wind angle, the thrust from the sails
suddenly disappears and reduces the boat speed. The boat becomes more difficult to steer
as the rudder becomes less effective.
The tack prevent function in WIND mode has been implemented to avoid such situations. It
reacts immediately when the apparent wind angle becomes 5° less than the set minimum
wind angle, and more rudder is commanded.
When running, it is difficult to steer the boat with waves coming sideways or from behind.
The waves can yaw the boat into an unwanted gybe; this can be hazardous for both the crew
and the mast.
The gybe prevent function is activated when the actual apparent wind angle becomes
greater than 175° or gets opposite to the set wind angle. More rudder is commanded to
prevent an unwanted gybe.
The tack and gybe prevent functions are not a guarantee against getting into a hazardous
situation. If the effect of the rudder and/or drive unit is not adequate, a dangerous situation
may occur. Pay particular attention in such situations.

WIND Nav mode

Note:

The

WIND Nav

mode is only available if the system has been set up for sailboat in the

Autopilot Commissioning dialog.

In WIND Nav mode the autopilot steers the boat given both wind and position data.
In this mode the autopilot calculates the initial course change needed to navigate towards
the active waypoint, but the pilot also utilizes the current wind direction in the calculation.

Turn pattern steering

The autopilot includes a number of automatic turn steering features when the autopilot is in
AUTO mode.

Note:

The turn steering option is not be 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 from within the turn dialog.
At any time during a turn you can select

Autopilot standby

in the System Controls dialog

to return to STBY mode and manual steering.
You can also stop a turn by pressing the

STBY/AUTO

key to return to STBY mode and

manual steering.

Turn variables

The turn steering options, except the C-turn, have settings that you can adjust before you
start a turn and at any time 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.

Note:

Refer to the separate Zeus

Installation manual for information about Rate limit

settings.

C-turn

Steers the vessel in a circle.
You can adjust the Rate of turn from the turn dialog before the turn is initiated and during
the turn. Increasing the turn rate makes the vessel turn a smaller circle.

Autopilot

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