Wiring a Garmin Marine Network
The optional Garmin Marine Network is a plug-and-play system that allows for high-speed data transfer between multiple Garmin chartplotters
and other network-compatible Garmin devices such as a Garmin sonar unit (GSD 22), a Garmin radar (GMR 18 or GMR 404/406), or an XM
Weather receiver (GDL30/30A). The GPSMAP 4000/5000 series chartplotters have three network ports that can be used to connect other
Garmin network-compatible chartplotters and devices. If the network requires more ports, use a Garmin Marine Network port extender (GMS
10), or another GPSMAP 4000/5000. Data from each connected component is shared by all the connected Garmin chartplotters.
Notes:
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NMEA 0183 devices must all be wired to one chartplotter on the network. The data is then shared over the network to other connected
chartplotters.
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Connect all chartplotters to the NMEA 2000 network as well as to the Garmin Marine Network. NMEA 2000 data is not shared over the
Garmin Marine Network.
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Connect network components, such as a Garmin GMR radar, GSD sounder, or GDL XM Weather receiver to any chartplotter on the network
or to an optional GMS 10 Network Port Expander. Data is shared between all chartplotters on the network.
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BlueChart® g2 Vision cartography data is shared with any connected GPSMAP 4000/5000 series chartplotter.
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Video input(s) from the Marine Video cable is only viewable on the chartplotter to which it is connected.
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You can connect a GPSMAP 4000/5000 chartplotter to a Marine Network with a GPSMAP 3000 series chartplotter:
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They will share GPS 17 GPS position information as well as information to and from standard NMEA 0183 devices.
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They will share information from connected network compatible Garmin devices such as a sonar unit (GSD 22), a radar (GMR 18 or
GMR 404/406), or an XM Weather receiver (GDL30/30A).
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Garmin GPSMAP 3000 series chartplotters CANNOT share cartography data with the GPSMAP 4000/5000 series chartplotters.
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All network components must be connected to the power source for the boat according to their installation instructions. The following
diagrams show only the network connections, not power connections.
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Currently, XM Weather and audio service is only available in the United States (lower 48). Because of this, a connected XM Weather
receiver (GDL30/30A) will only function in the United States (lower 48).
The Garmin Marine Network Cable:
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The Garmin Marine Network Cable has a locking ring that secures the cable to the chartplotter
or marine network device. Because of the size of this locking ring, it is not connected to the
network cable at the factory to make it easier to install on your boat.
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After the cable is run to the chartplotter or network device, snap the locking ring together
around the connector and insert the rubber washer as indicated on the instructions packaged
with the cable.
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GPSMAP 4000/5000 Series Installation Instructions
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