On a slight tangent although some might be able to see where I'm going with this...
(I don't have any experience with polar grid navigation....)
Can someone explain to me how it is possible that the
track from
Cape Hallet to
McMurdo on the two flight plans on Pg 72/73 of Mahon's book can only differ by 0.4 degrees (i.e. the difference between 188.9 and 188.5) when, if you evaluate the trigonometry, bearing in mind the east west distance between the two positions of McMurdo is 27.1 nm, and it is 336 nm between
Cape Hallet to
McMurdo, this would suggest a rather higher difference between the two tracks between the points, and depending on the wind, a significant(?) difference in heading required to reach either point?
I'm obviously missing something....
