Originally Posted by
POPA
If AirNav/AOPA/DUAT don't measure it as AT LEAST 50 miles, don't use it. If it comes up to 49.9 miles, that's still not 50.
That's what I did, I used duats to verify any "close" X-C's for my students. Remember, duats is approved source by the FAA, so therefor, the numbers it gives are going to be the ones they use, vs. your calculation with a plotter