1. Use the
Display
button to cycle through the
available pages.
2. Press and hold the
Tack
button for 3 seconds
to reset the maximum wind speed to the current
wind speed values.
Note:
All pages except for the
Current wind
speed
page are temporary and will time-out after
8 seconds.
Using Tack and VMG buttons
TACK
VMG
KTS
Tack
True/App
Display
VMG
1
2
D12550-2
During normal operation:
1. Press the
VMG
button to show the
VMG
page on
the digital display.
Note: VMG
information is only available when
vessel speed information is available.
2. Press the
Tack
button to show the
Tack
page on
the digital display.
Note: Tack
information is only available when
vessel heading and speed information is available.
True and Apparent wind
Wind angle, direction and speed are reported as
either ‘True’ or ‘Apparent’ wind measurements.
•
True wind
— True wind measurements assume
the vessel is motionless in the water. True wind
readings are calculated using Apparent Wind and
STW values.
•
Apparent wind
— Apparent wind is the wind felt
on deck when the vessel is in motion which is
affected by vessel angle and speed.
With the vessel tied along side, True and Apparent
wind readings should be identical.
D13142-1
3
1
2
1.
Wind direction (specified using compass points)
True Wind Direction (TWD)
— The compass
direction that wind would appear to be blowing
across the vessel if it was not making any way.
Apparent Wind Direction (AWD)
— The
compass direction that wind would appear to be
blowing across the vessel when it is making way.
2.
Wind angle (specified in degrees)
True Wind Angle (TWA)
— The angle between
the TWD and the center line of the vessel.
Apparent Wind Angle (AWA)
— The angle
between the AWD and the center line of the
vessel.
3.
Wind speed (specified in the chosen speed units)
True Wind Speed (TWS)
— The speed that the
wind would appear to be blowing across the
vessel if it was not making any way.
Apparent Wind Speed (AWS)
— The speed
that the wind would appear to be blowing across
the vessel when it is making way.
Note:
True Wind readings require Speed Through
Water (STW) data to be available.
Switching between true and apparent wind
information
You can switch the unit between displaying True or
Apparent wind information.
D12551-2
1
2
During normal operation:
1. Press the
True / App
button to switch between
true or apparent wind information.
• In
True
mode the indicator shown in 1 above
will be displayed.
• In
Apparent
mode the indicator shown in 2
above will be displayed.
Using your display
45
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