Hover or tap underlined Spanish terms to see their translation and exam tip.
El 6 de junio de 2020 a HRB: 07:45 nos encontramos en situación verdadera 36°08,5´ N 006°12,0´ W, navegando al Rumbo de Aguja 100° y una Velocidad de Máquinas de 8 nudos, siendo el Desvío 1,5° (+) y la Declinación Magnética 2,5° (-). Esta soplando un viento del norte que nos abate 10° y nos encontramos en zona de corriente de Rumbo = Sur e Intensidad Horaria = 3 nudos. ¿Cuál de las siguientes coordenadas más se aproxima a nuestra posición a la Hora de Reloj de Bitácora (HRB): 09:00?On 6 June 2020 at ship’s clock 07:45 we are at true position 36°08.5´ N 006°12.0´ W, on Compass Course 100° at an Engine Speed of 8 knots, Deviation being 1.5° (+) and Magnetic Variation 2.5° (-). A north wind gives 10° of leeway and we are in a current setting South at 3 knots. Which position is closest to ours at 09:00?
Show the answer
Correct answer: b) 36°01.4´ N; 006°00.3´ W
Why it is correct
True 099º. The north wind is to port: 109º. 10 miles and 3.75 of current south. Arrival: 36º 01.5′ N, 006º 00.3′ W.
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 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
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de diciembre · PY Test 1 · question 32 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de diciembre · PY Test 3 · question 35 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.