Raymarine ST70 Instrument, Installation Manual

Page: 48 / 73

38 ST70+ User Reference Manual
Miscellaneous setup
Setting ground wind
You can choose either Speed Over Ground (SOG) or Speed Through Water (STW)
from which to derive the ground wind speed.
To set the required method:
1. At a convenient Instrument keypad press
MENU
to select the Main menu .
2. Scroll to Advanced Options then press OK to
select the Advanced Options menu
3. Scroll to select the Ground Wind option.
4. Press
OK
to display the Ground Wind setup
box.
5. Scroll to select either STW or SOG, then press
OK
to return to the Advanced Options menu .
Now proceed to Set magnetic variation.
Setting magnetic variation
The magnetic variation is the difference in heading
between true north and magnetic north. Before
setting this, refer to an up-to-date chart of the area in which you intend using your
boat, to ascertain the correct value of magnetic variation.
Note:
As the magnetic variation is dependent on your geographical location, you may need to
change the magnetic variation value during a long voyage.
To set the magnetic variation:
1. With the
Advanced Options menu displayed (as
above), scroll to select the Variation option.
2. Press
OK
to display the Variation setup box.
This has two adjust boxes, an upper box which
shows the variation mode, and a lower box that
shows the variation value.
3. If necessary, press
PAGE UP
to select the
upper (mode) adjust box.
D
111
8
0
-1
Advanced Options
Ground Wind
Press OK to select
N
S
W E
N
W E
i
D1
1
181-1
Press OK to accept
Ground Wind
SOG
Select data source for Ground
Wind.
N
S
W E
N
W E
D
111
8
2
-1
Advanced Options
Variation
Press OK to select
N
S
W E
N
W E
i
D11183-1
Press OK to accept
Variation
On
-6°
Press CANCEL to exit without
saving.
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