[aprssig] GPS upgrade

[Tapio Sokura]

Dale Blanchard wrote:
> I am having problems with finding which Garmin GPS has NMEA input and 
> output.

You can check the NMEA features of each Garmin unit at their web pages. 
If the specifications page doesn't make it clear, the manual at least 
has the details.

Some rules of thumb:
1) etrex units with black-and-white screens have a serial port
2) etrex units with color screens don't have a serial port (they only 
have USB)
3) gpsmap 60 ja 76 -series all have serial ports, current models have 
both serial and USB.
4) just about all of the marine units have serial port(s), some might 
have usb as well

So basically if you make your pick from the marine or outdoor product 
range and stay away from the etrex-units with color screens, you should 
have a working serial port. Of course when you find a unit that 
interests you, check its specification page and/or manual to be sure of 
the ports available.

   Tapio