<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by NickW:
You may end up with problems, as most of the GPS units for which I've seen specs only read up to 999 knots, which is a bit too slow for Concorde's M2.02 cruising speed :-)</font>
The windows on Concorde were too small and probably too hot for me to get an accurate reading. It did aquire but speed and altitude were going up and down all the time....