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En situación estimada 19º 44' S, 132º 32' W, se observan simultáneamente dos astros. Para el primer astro se calcula Z = 067º, Δa = –4,3’ y para el segundo astro Z = 349º, Δa = +3,2’. Calcular la situación observada.At DR position 19º 44' S, 132º 32' W, two bodies are observed simultaneously. For the first we calculate Z = 067º, Δa = –4.3’ and for the second Z = 349º, Δa = +3.2’. Calculate the observed position.
Show the answer
Correct answer: b) 19º 41.8’ S, 132º 37.9’ W
Why it is correct
The lines cross at 19º 41.8′ S, 132º 37.9′ W.
Why the others are not
- a) It does not match the working.
- c) It does not match the working.
- d) It does not match the working.
How to work it out in the exam
- Draw each line at right angles to its azimuth, Δa miles from the DR position, towards the body if positive.
- The crossing gives the fix.
Where this question comes from
- Junta de Andalucía · 2024 · 1ª convocatoria · CY Módulo de navegación · question 20 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.