When using Garmin Radar and sonar modules, you will need a network expander GMS10. insTallinG The UniT Install the Wiring Harness The unit comes with a wiring harness that connects the unit to power and the transducer with one easy-toremove connection and provides interface capabilities for connecting external devices. The color code in the diagram (see page 41 for GPSMAP2008/2108) indicates the appropriate harness connections. The replacement fuse is a AGC/ 3AG - 3 Amp fuse. If it is necessary

Configuring Communications Settings To change the communications settings, from the Home screen, select Configure > Communications. serial Port 1—select the input/output format to use when connecting your unit to external NMEA devices, a personal computer, or other Garmin devices. • Garmin Data Transfer—the proprietary format used to upload, download, or exchange data with a computer or another Garmin unit. • Garmin Remote sonar—allows you to connect a GarminGSD 21orGSD 22serially. • NMEA In/NME