B&G Zeus2 12 - Manual (Page 53)

Sea state filter
The Seastate filter is used to reduce rudder activity and autopilot sensitivity in rough weather.
OFF Seastate filter is disabled. This is default
AUTO Reduces rudder activity and autopilot sensitivity in rough weather by an
adaptive process. The AUTO setting is recommended if you want to use the
seastate filter
MANUAL Linked to the steering response control settings described previously. It may be
used to manually find the optimum combination of course keeping and low
rudder activity in rough but steady sea conditions
Sailing parameters
Ú Note: Sailing parameter settings are only available if the boat type is set to Sail.
Tack time
When performing a tack in WIND mode, the rate of turn (tack time) can be adjusted. This will
give single-handed sailors time to handle the boat and the sails during a tack.
A turn performed without shifting wind side, will also be made at a controlled turn rate.
Tack angle
This value is used to preset the course change used when tacking in AUTO mode. By
pressing the port and starboard indicators in the autopilot pop-up the course will change as
much as this value.
Wind function
With wind function set to AUTO, the autopilot will automatically select between apparent
and true wind steering. AUTO is default and recommended for cruising.
When the boat is running, it will also be surfing on the waves. This may lead to significant
changes in boat speed, and thereby also changes in apparent wind angle. True wind steering
is therefore used when running, while steering to apparent wind is used when beating or
reaching.
Apparent wind steering is preferred when you want to achieve maximum boat speed. The
autopilot tries to maintain a constant apparent wind angle to get maximum thrust from a
given trim of the sails.
When sailing in closed waters, the apparent wind angle may change temporarily due to wind
gusts. It may then be preferred to sail to the true wind.
VMG optimizing
You can optimize the VMG to wind. When selected, the function will be active for 5–10
minutes after a new wind angle has been set and only when beating.
Layline steering
Layline steering is useful when navigating. Cross Track Error (XTE) from the navigator will
keep the boat on the track line. If the XTE from the navigator exceeds 0.15 NM, the autopilot
will calculate the layline and track towards the waypoint.
Autopilot | Zeus2 Operator Manual 53