[aprssig] high altitude gps and radios

[Brad Burleson]

> I can personally recommend pretty much any unit that SkyTraq sells.

Ugh.  Ok, I didn't really mean that.  My intent was to say that
SkyTraq seems to get the idea of a proper high-altitude support and in
my limited experiences the hardware has matched their spec sheets.

So I'd _suspect_ that any device they do sell operates in a HAB-friendly manner.

Sorry to be an idiot,

Brad
KF7FER