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2. STEERING MODES
2-27
2.10.2 Wind angle mode
There are two wind angle modes: App (Apparent Wind Angle) and TWA (True Wind
Angle).
To select the wind angle mode, do the following:
1. In the Wind mode, long press the key to open the menu.
2. Rotate the Course control knob to select the current setting for [Mode Type] then
push the knob.
[Mode Type] also appears on the [Wind Option] menu.
3. Rotate the Course control knob to select an option then push the knob.
4. Press the key to close the menu.
Wind angle
mode
Description
Steering mode
indication
App
(Apparent
Win Angle)
The boat is steered so that the apparent wind angle
is constant. AWA mode requires wind angle and
speed data from a wind sensor. Use this mode when
the wind is stable.
TWA
(True Wind
Angle)
The boat is steered so that the true wind angle (in re-
lation to ship’s bow) is constant. This mode requires
apparent wind angle, apparent wind speed, your
boat's speed and heading. Use this mode when
there is an unstable downwind.
W
W
App
App
W
W
TWA
TWA
N
NOTICE
When running on engine, use
the TWA mode.
The autopilot cannot control your
boat when its speed exceeds the
true wind speed in the App mode,
which can lead to a potentially
dangerous situation.
True wind
Apparent wind
Apparent wind angle
Boat's
heading
Own boat's
movement
True wind angle
AWA
TWA