CONNECTING THE ACCESSORY CABLE Use the accessory cable to connect the radio to a GPS receiver, a GPS chartplotter, and an external speaker.

The wiring diagram below shows the connections for each accessory.
Yellow: NMEA_IN (+)
Red: External Speaker (+)
White: NMEA_OUT(+)
Orange: N/A
Black: GND/External Speaker (-)
Brown: NMEA_OUT(-)
Bare: Shield/GND
Green: NMEA_IN (-)
ACCESSORY CABLE WIRES CONNECTS TO…
NMEA Data Output (-) or GND from GPS receiver
NMEA Data Output (+) from GPS receiver
NMEA Data Input (+) on Chartplotter
Speaker (-)/GND
Speaker (+)
NMEA Data Input (-) on Chartplotter
Connecting to a GPS Receiver
If you connect the radio to a GPS receiver, the radio can automatically transmit your current position during an automated distress call or during a normal DSC call.
Your radio supports a standard NMEA0183 input from a GPS receiver. Follow the steps below to connect your radio to your GPS receiver: 1. Connect the GREEN wire of the included accessory cable to the GPS DATA OUTPUT (-) WIRE or the GROUND WIRE on your GPS receiver.
2. Connect the YELLOW wire of the included accessory cable to the GPS DATA OUTPUT (+) WIRE on your GPS receiver.
3. Be certain all wire connections are secure and that all open wires are adequately covered. # NOTE: to extend the life of the radio, use waterproof tape to seal electrical connections.
4. Plug the accessory cable into the accessory cable pigtail on the back of your radio. GPS Verification
If the GPS receiver is correctly connected and it transmits valid data, the display shows GPS Data OK. Press ENT-1W25W to open the GPS status screen and see detailed GPS data: