Searched but haven't found how to drill hole in firewall...

[DJinCO]

Thanks! Took a little drive today - supposed to snow tomorrow. I love how the APRS track shows our path.
That tracking will be very useful when we are in the mountains. We find rocks and then we try to find them again without success. Now with the GPS track we will be able to find those great spots. I have no hope that the track will populate on aprs.fi because up in the mountains I doubt i'll get coverage, but I can write my track to the SD card.

 

[LagunaH1]

On the most recent trip to Moab I would routinely receive APRS beacons from hundred of miles away unless I was in a hole RF wise. If you are up in the mountains I think you might be pleasantly surprised by how far your signal travels. One of the cool features of aprs.fi is that you can see which station heard any one of your APRS beacons. I found that I was being heard 150 - 250 miles away in many situations.

Edit:
APRS on VHF (2 meters / 144.390 Mhz) is very line of sight. But: if you are at altitude then there is a surprisingly good chance that the signal will get out.