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Un buque se encuentra en situación 15º 00' S, 178º 00' E y desea navegar hasta el punto 10º 00' S, 176º 00' W. Calcular el rumbo directo.A ship at 15º 00' S, 178º 00' E wants to sail to 10º 00' S, 176º 00' W. Calculate the direct course.
Show the answer
Correct answer: b) N49.5E
Why it is correct
It crosses the 180º meridian eastward: ΔLong = 360′. Departure = 351.5′. Δlat = 300′ N. Course N 49.5º 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 · 2016 · 2ª convocatoria · PY Módulo de navegación · question 20 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.