Hover or tap underlined Spanish terms to see their translation and exam tip.
A HRB = 09:00 en situación latitud 35 50´N y Longitud 006º 10´W navegamos al rumbo de aguja 060º y velocidad del buque 6 nudos y con viento del NW que nos abate 10º. Declinación magnética = 5º NE. Desvío de la aguja +4º (más). Calcular la situación a HRB = 10:30.At ship’s clock 09:00 at latitude 35 50´N and longitude 006º 10´W we sail on compass course 060º at 6 knots with a NW wind giving 10º of leeway. Variation = 5º NE. Deviation +4º (plus). Calculate the position at 10:30.
Show the answer
Correct answer: c) 35º 51.4' N 005º 59.3' W
Why it is correct
True 069º. The NW wind is to port: 079º. 9 miles give 1.7′ N and 8.8′ E. That is 35º 51.7′ N, 005º 59.1′ W, very close to c.
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 each leg’s course, with leeway if any.
- Break each leg and the current into north-south and east-west, and add them.
- Turn departure into longitude: ΔLong = departure / cos(mean latitude).
Where this question comes from
- Junta de Andalucía · 2018 · 1ª convocatoria · PY Módulo de navegación B · question 13 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.