Setting Magnetic Variation - Raymarine ST70+ Operating Manual

Chapter 2: Commissioning Procedures
2. Scroll to Advanced Options then press OK to
select the Advanced Options menu
3. Scroll to select the Ground Wind option.
OK
4. Press
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.
OK
2. Press
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
(mode) adjust box.
4. Scroll to select the required mode:
• Select ON if you want to set a value for
variation. if you choose this mode, the value
you set will be applied to the rest of the system.
• Select OFF if you do not want to apply a variation value to the system.
• If SLAVE is displayed in the mode adjust box, the variation has been set at
another product in the system, and the value is shown in the lower adjust box.
In this mode. In this case you cannot change the variation value.
to display the Ground Wind setup
to display the Variation setup box.
PAGE UP
to select the upper
Advanced Options
N N
W W E E
S
Ground Wind
Press OK to select
Ground Wind
SOG
N N
W W E E
S
Select data source for Ground
i
Wind.
Press OK to accept
Advanced Options
N N
W W E E
S
Variation
Press OK to select
Variation
Press CANCEL to exit without
i
saving.
Press OK to accept
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On
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