GCT
Great Circle TRACK - track.
The shortest line from a to b over the Earth.
Shorter than this one would need Thunderbird 4. (was it TB4 the one with the drill on it. . ?)
You can work out the Great Circle TRACK using one of many internet GCT thangs and they will do it for you.
There is formula for working out the Great Circle Track . .which is:
Last edited by Upper Air; 1st Mar 2011 at 16:34.
Reason: ran out of ink