New GPS Visualizer featu "range rings"

john smith wrote:

Very cool. Not sure what the application is, but very cool : )

Keeping clear of TFR's.

Hmmm. I just looked up the definition of TFR (I'm not a pilot myself)
and learned that maybe I should add a couple lines of code to recognize
nautical miles as units, since that's what the FAA uses. What's the
usual abbreviation for those? NM?


By the way, the original request for this feature was from a glider
pilot who wanted a way to visualize the "silver," "gold," and "diamond"
distances of sailplane flights. So there's one application, anyway.


Adam