Hover or tap underlined Spanish terms to see their translation and exam tip.
Navegamos a 11 nudos al rumbo de aguja 270º, con viento del SW que nos produce un abatimiento de 15º y una corriente de Rc = 050º e Ih = 4′. Declinación magnética = 6º NE, desvío = +8º. Calcular el rumbo efectivo.We sail at 11 knots on compass course 270º, with a SW wind giving 15º of leeway and a current setting 050º at 4 miles an hour. Variation = 6º NE, deviation = +8º. Calculate the course made good.
Show the answer
Correct answer: d) 320º
Why it is correct
True 284º. The SW wind is to port: 299º. Adding 11 miles at 299º and 4 miles at 050º gives 320º.
Why the others are not
- a) It does not match the working.
- b) It does not match the working.
- c) 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 17 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.