TorgeirH
Internettet leverer varene. Her omtales Garmin 840, men ledningene er de samme:
The 840 uses it's power ground as the NMEA 0183 ground
Here it is:
840 100
blue purple
brown blue
the 2 negative wires (gray/brown) on the VHF 100 connect to a common ground shared by the power ground of the 840. They can be connected straight to the power ground of the 840.