Beagle,
Many thanks.
So course to steer will change as you get closer to C and just as you arrive at C you will be on the original course. Your explanation of using the 'halfway point' (which you never reach) clarifies how it does it.
The result will be a curved course arriving at C on the original heading.
By following the bearing to C you will follow a straight line directly to C but arrive pointing at the 'wrong' heading.
ZA
Last edited by Zulu Alpha; 16th November 2008 at 18:44.