Chapter 2: Following a route 21
Requirements for Wind Vane mode
To operate in Wind Vane mode, the SPX-5 Tiller system must receive wind
information from one of the following sources:
• SeaTalk wind instrument connected via SeaTalk.
• NMEA wind instrument.
• SeaTalk
ng
wind transducer.
True and apparent wind
SPX-5 Tiller systems can maintain a course relative to either an apparent or true wind
angle in Wind Vane mode.
The default setting is apparent wind. If required, you can change this to true wind in
User Calibration (see
page 13
).
Note:
In order to sail to true wind, the SPX-5 Tiller system needs a wind speed input.
WindTrim
In Wind Vane mode the SPX-5 Tiller system uses WindTrim, to provide smooth and
precise performance with minimal power consumption by eliminating the effects of
turbulence and short term wind variations. You can adjust the wind response
(WindTrim) level in User Calibration (see
page 13
) to control how quickly the SPX-5
Tiller system responds to changes in the wind direction. Higher wind trim settings will
result in a pilot that is more responsive to wind changes.
Operating hints for Wind Vane mode
• Always trim your sails carefully to minimize the amount of standing helm.
• Reef the headsail and mainsail a little early rather than too late.
• In Wind Vane mode the SPX-5 Tiller system will react to long-term wind shifts, but
will not correct for short-term changes such as gusts.
• In gusty and unsteady inshore conditions, it is best to sail a few degrees further off
the wind so that changes in wind direction can be tolerated.
Entering Wind Vane mode
You can enter Wind Vane mode from either Standby or Auto mode. To do this:
1. Steady the boat onto the required wind angle.
2. Press
standby
and
auto
together to select Wind Vane mode and lock the current
wind angle.
MAG
D10532-1
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