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45
Installing the Hardware
Connecting accessories
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.
The UM425 supports a standard NMEA0183 input from a GPS receiver.
Follow the steps below to connect the UM425 to your GPS receiver:
13.8V DC
Accessory
cable
Accessory
connector
Green: GPS Data IN (+)
Bare wire: Ground/ GPS Data IN (-)
Black: Ext. Speaker (-)/GND
Red: External Speaker (+)
Brown: PA Speaker (+)
Blue: PA Speaker (-)/ GND
Orange: NMEA OUT (-)
Yellow: NMEA OUT (+)
Line up
arrows to
connect
Disconnect the 1. accessory cable from the accessory connection on the
radio.
Connect the BARE wire of the included 2. accessory cable to the
GROUND WIRE on your GPS receiver.
Connect the GREEN wire of the included 3. accessory cable to the GPS
DATA OUTPUT WIRE on your GPS receiver. On page 46 is a table of
common GPS receivers and the proper connections:
NOTE: If not using the accessory connector make sure the cap is rmly secured.
UM425 VHF OM.indd 45 28/9/11 11:55:22 AM