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El 05 de abril de 2024, nos encontramos en situación 40° 00,0′ S, 178° 55,0′ E y damos rumbo a un punto situado en 28º 40,0´ S y 177º 00,0´W. Calcular el rumbo verdadero que debemos hacer para llegar a dicho punto (redondear al grado más próximo).On 5 April 2024, we are at 40° 00.0′ S, 178° 55.0′ E and set course for a point at 28º 40.0´ S and 177º 00.0´W. Calculate the true course to reach that point (to the nearest degree).
Show the answer
Correct answer: b) 017º
Why it is correct
It crosses the 180º meridian eastward: ΔLong = 245′. Δlat = 680′ N. Departure = 203′. Course N 17º E.
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
- Find the difference of latitude and the departure: ΔL × cos(mean latitude).
- Course = arctan(A / Δlat). Distance = root of the sum of squares.
Where this question comes from
- Junta de Andalucía · 2024 · 1ª convocatoria · PY Módulo de navegación · question 20 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.