I have a Garmin
Echomap 62cv on my boat
and so far I only connected an analog Airmar transducer
via one special Garmin
cable and send nmea
info out from the two extra wires in the Garmin power cable.
Now I need to connect an eternal AIS
module via nmea
but i cannot find the information on how to do that. Does Garmin require a special cable here?
On the same note:
There are three ports
on the back of the device but the manual does not say what the middle one is used for, let alone what the pinout would be.
Can anyone help here?