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Old 27th Nov 2017, 19:11
  #1162 (permalink)  
selfin
 
Join Date: Apr 2004
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That question is so poorly worded that it ceases to be meaningful. It seems to ask for the final forward azimuth of a geodesic (great circle) between the given stand- and forepoints. On the WGS84 ellipsoid this angle is 249 deg (east of true north). See `fazi2` in Charles Karney's GeodSolve utility here (add 360 degrees to negative values). Chris Veness's implementation of the older Vincenty algorithm for the inverse solution can also be used, here. In practice you'd lay a line down on a Lambert conformal conic projection, e.g. UK CAA VFR Air Chart, and measure the local direction at the forepoint 53N 003E.

"Final true track" is a mongrel construct and should be avoided. "Track" is not explicitly defined as a loxodrome (rhumb line), or a geodesic (great circle), in any major text on navigation. Paths with constant true track values are always loxodromes so the qualifier "final" is redundant.
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