I have having trouble with my NEMA communication between my
Garmin 172C
GPS/Plotter and ICOM M502A
VHF. I have the
GPS set to communicate on both port 1 & 2 at NEMA in/out. However, when I turn on the position feature on my
VHF, I have the message "NO POS DATA". The two units are connected via a red rca plug. Any help would be greatly appreciated.
Thanks,
Gavin