The Garmin instruction manual refers to them as Ports 1 and 2. One sends
data to the VHF, the other receives data from the VHF and plots it.

"Meindert Sprang" wrote in message
...
"William Andersen" wrote in message
news4kPf.2517$3k1.1227@dukeread03...
Both the Garmin and the VHF have two ports.
The VHF has one to receive GPS info from the Garmin, which is displayed
on
the VHF and transmitted with DSC, and another to send received info (from
a
DSC reception) to the Garmin so that it will be displayed on the Garmin.


"Dennis Pogson" wrote in message
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I have the config set the way the Garmin tech. told me on COMM2 .

What is this? Didn't know VHS had com ports?

But in this case we're talking about COM2 on the Garmin....

Meindert