Its been a while! but here we go,
Draw the picture, a polar stereographic picture of the northern hemisphere, looking at your 2 points A and B you are going straight over the top.
1 deg of lat = 60 nm
So your calculation is simply a total change in Latitude x 60
Total change in latitude is
90-59°34.1' = 30°25.9'
90-30°25.9' = 59°34.1'
add them together and x by 60 = 90x60=5400nm
Last edited by Nearly There; 15th July 2009 at 21:31.
Reason: took to long to find degrees on the keyboard, the guys above beat me to it!