Hover or tap underlined Spanish terms to see their translation and exam tip.
Navegamos al rumbo verdadero = 260º a 8 nudos de velocidad. A HRB = 19:30 nos encontramos en situación 35º 55′ N y 005º 55′ W. Sopla viento del N que nos produce un abatimiento de 15º y nos afecta una corriente de Rc = NW e intensidad horaria = 3 millas. Calcular la situación a HRB = 21:00.We sail on true course 260º at 8 knots. At ship’s clock 19:30 we are at 35º 55′ N and 005º 55′ W. A N wind gives 15º of leeway and a current sets NW at 3 miles an hour. Calculate the position at 21:00.
Show the answer
Correct answer: c) 35º 53.1′ N, 006º 12.4′ W
Why it is correct
The north wind is to starboard: 245º. 12 miles and 4.5 of current NW. Arrival: 35º 53.1′ N, 006º 12.4′ W.
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 · 2023 · 2ª convocatoria · PY Módulo de navegación · question 15 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.