In article ,
Matt Whiting wrote:

I don't know where to get an accurate assessment of
the real cost of our aviation system (airports, ATC, navaids - we'd need
to pay our share of the cost of GPS for example)

since I don't use GPS, my "fair share" would be zero.

Even if I used GPS for my bugsmasher, the cost to provide
regular ol' SPS GPS for my use is still zero.

--
Bob Noel
no one likes an educated mule