Problem Great Circle

Problem Great Circle

2 Posts

  • A and B are on the parallel of 30N and A is at 8W. If GC bearing of B from A is 087, then what is Bs longitude? Please explain!
  • Both being on 30*N latitude we know Rhumb line bearing of B from A will be 090 and Great Circle bearing is given 87…so conversion angle is 3*

    Convergency =2 C.A. = 6
    Converygency = d(long) X sin (mean lat)
    6 / sin 30 = 6 / 0.5 = 12 is your change is longitude

    008*W + 12 in easterly direction = 004*E
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