as long as the GPS is working. But it's a low-powered signal from orbit
and it's easily jammed.

How true is this, really? In an aircraft, you are between the ground
and the satellite. How does someone on the ground interfere with the
signal?

all the best -- Dan Ford
email: www.danford.net/letters.htm#9

see the Warbird's Forum at www.warbirdforum.com
and the Piper Cub Forum at www.pipercubforum.com