Raymarine c125, Installation And Operation Instructions Manual

Page: 154 / 464

System preferences menu
Menu item Description Options
Bearing mode Determines how all bearing and heading data is
displayed in. This does not affect how the chart or
radar displays are drawn. • True (default)
• Magnetic
Variation Source This setting compensates for the naturally
occurring offset of the earth's magnetic field.
When set to Auto, the system automatically
compensates, and displays the compensation
value in brackets. To enter your own
compensation value, use the Manual option, then
specify the value using the Manual Variation
setting (see below). This value is also transmitted
to any other connected Raymarine instruments. • Auto (compensation value
displayed) (default)
• Manual
Manual Variation When the Variation Source menu item is set to
Manual (see above), you use the Manual Variation
setting to specify the compensation value that you
want to use. • Range: 0 to 30 degrees, East or West
•
System Datum In order for your GPS receiver and multifunction
display to correlate accurately with your paper
charts, they must be using the same datum.
The default datum for your multifunction display is
WGS1984. If this is not the datum used by your
paper charts, you can change the datum used by
your multifunction display.
When you change the datum for your multifunction
display, the chart grid will subsequently move
according to the new datum, and the latitude /
longitude of the cartographic features will also
change accordingly. Your multifunction display
will attempt to set up any GPS receiver to the new
datum, as follows:
• The internal GPS receiver will automatically
correlate each time you change the datum.
• If you have a Raymarine GPS receiver using
SeaTalk or SeaTalk ng , it will automatically
correlate each time you change the datum on
the multifunction display.
• If you have a Raymarine GPS receiver using
NMEA 0183, or a third-party GPS receiver, you
must correlate it separately.
It may be possible to use your multifunction
display to correlate an NMEA 0183 GPS receiver.
From the homescreen go to
Set-up > System
settings > GPS Set-up > View Satellite Status .
If the datum version is displayed, it may be
possible to change it. From the homescreen go
to
Set-up > System settings > Data Sources >
GPS Datum .
Note: Raymarine recommends that you
check the displayed vessel position in the chart
application against your actual proximity to a
known charted object. A typical GPS has an
accuracy of between 5 and 15 m.
154 a Series / c Series / e Series