17. The
track at A is the
angle Pole-A-B.
From inspection we
note that it is less
Pole than 90º.
060ºW 060ºE Consider triangle
Pole-A-B: distance
A: 70ºN Pole-A = Pole-B so
060ºW B: 070ºN angle A = angle B.
060ºE Angle at pole =
60º + 60º = 120º,
000º E/W Therefore angles A
and B are 30º.