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Estando en situación de estima: le = 40º 15` N y Le = 003º 20’ E, se observa el sol a su paso por el meridiano superior del lugar con una altura verdadera meridiana avmʘ 47º 48` siendo su declinación dʘ - 1º 55, 7`. Calcular la latitud observada.At DR position le = 40º 15` N and Le = 003º 20’ E, the sun is observed on the upper meridian with a true meridian altitude of 47º 48`, its declination being - 1º 55.7`. Calculate the observed latitude.

Show the answer

Correct answer: d) lo = 40º 16.3’ N

Why it is correct

z = 42º 12′. l = −1º 55.7′ + 42º 12′ = 40º 16.3′ N.

Why the others are not

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

How to work it out in the exam

  1. z = 90º − a.
  2. Facing south: l = d + z, with south d negative. Facing north: l = d − z.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.