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Chapter 3: Advanced Operation 27
3 Advanced Operation
3.2 Using Wind Vane mode
Note: You can only use Wind Vane mode if you have connected the
ST4000+ to a suitable wind instrument/vane providing SeaTalk or
NMEA wind direction information.
To use Wind Vane mode (also known as Vane mode), the ST4000+
must receive wind information from one of the following sources:
• SeaTalk wind instrument, connected to the ST4000+ via SeaTalk
• NMEA wind instrument
• Raymarine wind vane connected through a SeaTalk interface box
In Wind Vane mode the ST4000+ maintains a course relative to an
apparent wind angle. It uses wind trim to eliminate the effects of
turbulence and short term wind variations. This provides smooth and
precise performance with minimal power consumption.
When the ST4000+ is in Wind Vane mode it uses the fluxgate
compass as the primary heading reference. As changes in the
apparent wind angle occur, the ST4000+ adjusts the locked compass
heading to maintain the original apparent wind angle.
Selecting Wind Vane mode
You can select Wind Vane mode from either Standby or Auto mode:
1. Steady the boat onto the required apparent wind angle.
2. Press
standby and auto together to select Wind Vane mode and
lock the current apparent wind angle:
• the display shows the locked heading (e.g.
128°) along with
the apparent wind angle (e.g.
WIND 145P indicates an apparent
wind angle of 145° to port)
The ST4000+ will then adjust the boat’s heading to maintain the
locked apparent wind angle.
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