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Connecting the Compass
NMEA 2000 Network Connection
If you do not have an existing NMEA 2000 network, you must install a NMEA 2000 network on your boat. For
more information on NMEA 2000, go to garmin.com/manuals/nmea_2000.
The compass is packaged with a NMEA 2000 T-connector and a NMEA 2000 drop cable. You will use these two
components to connect the compass to your existing NMEA 2000 network.
A 6 m (20 ft.) drop cable is included. If more cable is needed, add an extension to your NMEA 2000 backbone,
based on the NMEA 2000 guidelines. A shorter drop cable can be installed if desired.
MSC 10
NMEA 2000 drop cable
NMEA 2000 T-connector
NMEA 2000 backbone
Heading Calibration
This device uses GPS signals to calculate the heading, so calibration is not required.
This device also contains an internal magnetic compass that can be used as a backup to avoid a possible loss
of heading information in areas where GPS signals are blocked or weak, such as under bridges, near tall
structures, and in covered slips. Calibration of the backup magnetic compass is highly recommended. If you
plan to use the backup magnetic compass, verify that the device is installed in a location free from magnetic
interference
(Compass Mounting Considerations, page
(optional).
There are two options you can use to calibrate the backup magnetic compass:
• If the device is connected to the same NMEA 2000 network as a Garmin
the menu-based calibration procedure
• If there is not a Garmin chartplotter connected to the NMEA 2000 network, or if you are connected to a third-
party display device, you must use the basic calibration procedure
2) and perform the appropriate calibration process
(Performing Menu-Based Calibration, page
®
chartplotter, you should perform
8).
(Performing Basic Calibration, page
9).
7
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