Hover or tap underlined Spanish terms to see their translation and exam tip.
Un buque se encuentra en situación 12º 20'S, 177º 20' W y desea navegar hasta el punto 09º 10' S, 178º 15' E. Calcular el rumbo directo. (Aproximar al medio grado) y distancia a navegarA ship at 12º 20'S, 177º 20' W wants to sail to 09º 10' S, 178º 15' E. Calculate the direct course (to the nearest half degree) and distance.
Show the answer
Correct answer: c) N54W, 322 miles
Why it is correct
It crosses the 180º meridian westward: ΔLong = 265′. Departure = 260.4′. Δlat = 190′ N. Course N 54º W, 322 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
- 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 · 3ª convocatoria · PY Módulo de navegación · question 20 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.