Perhaps I'm missing the point here?
This thing cost $150 US. What aviation instruments can you get for
"a buck fifty"? A magnetic compass costs more.
And as Tom put it, if S+R have your Lat and Lon they will likely look
for you on the ground, whatever the elevation.
Since the demise of the dial-up modem, everyone has forgotten that
bandwidth costs money.
Jim

On Apr 30, 8:14 pm, (Ron Lee) wrote:
Pat Russell wrote:
Why, oh why, after recognizing the need to advance the state of the
art of Search and Rescue, after going to all the trouble and expense
of designing a clever low-cost device that can communicate with two
separate satellite services and the 911 infrastructure, after going to
all the trouble of determining an accurate fix in three dimensions,
WHY DOES IT REPORT ONLY TWO OF THEM?