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Calcular la distancia Ortodrómica desde un punto A (de coordenadas l=05º35’N y L=077º28’W), a un punto B (de coordenadas l=50º47’N y L=156º38’E).Calculate the great circle distance from point A (l=05º35’N and L=077º28’W) to point B (l=50º47’N and L=156º38’E).

Show the answer

Correct answer: c) 6,424’

Why it is correct

It crosses the 180º meridian: ΔLong = 125º 54′. The formula gives about 6424 miles.

Why the others are not

  • a) It does not match the working.
  • b) It does not match the working.
  • d) It does not match the working.

How to work it out in the exam

  1. cos D = sin l1 sin l2 + cos l1 cos l2 cos ΔL, with south latitude negative.
  2. Turn D into minutes: each minute is a mile.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.