B&G Zeus2 series, Operator'S Manual

Page: 62 / 126

Wind function
With wind function set to AUTO, the autopilot automatically selects between apparent and
true wind steering. AUTO is default and recommended for cruising.
When the boat is running, it is also 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 is 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 keeps
the boat on the track line. If the XTE from the navigator exceeds 0.15 NM, the autopilot
calculates the layline and track towards the waypoint.
Response
By default the system switches between HI/LO parameter set based on speed (motor boats)
or speed and wind (sail boats). You can however manually select which parameter set that
shall be used.
HI or LO must be selected if no speed input is available.
You can manually fine tune each of the two (HI/LO) parameter sets. Level 4 is default with
parameter values as set by the autotune function. If no autotune is made (not
recommended) the level 4 values are the factory default values.
A low response level reduces the rudder activity and provides a more “loose” steering.
A high response level increases the rudder activity and provides a more “tight” steering. A too
high response level causes the boat to start lazy-s movements.
Automatic steering
This option displays an overview of all autopilot steering parameters, and you can adjust
parameters if required.
For more details, refer to the separate Zeus
2
Installation manual.
Installation
Used for autopilot installation and commissioning. See the separate Zeus
2
Installation
manual.
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Autopilot | Zeus2 Operator Manual