Set Ground Wind; Set Magnetic Variation - Raymarine ST70 User's Reference Manual

Chapter 2: Commissioning Procedures

Set 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. With the Advanced Options menu displayed,
<
use or
ENTER
2. Press
box.
<
3. Use or
ENTER
press
menu.
Now proceed to Set magnetic variation .

Set 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,
<
use or
ENTER
2. Press
box. This has two adjust boxes, an upper box
which shows the variation mode, and a lower
box that shows the variation value.
3. Press
>
to select the Ground Wind option.
, to display the Ground Wind setup
>
to select either STW or SOG, then
to return to the Advanced Options
>
to select the Variation option.
, to display the Variation setup
to select the upper (mode) adjust box.
Advanced Options
Ground Wind
Press ENTER to select
Ground Wind
SOG
Select data source for Ground Wind.
i
Press ENTER to accept
Advanced Options
Variation
Press ENTER to select
Variation
degrees
Set difference between Magnetic
i
and True bearings.
Press ENTER to accept
15
On
-6