Hover or tap underlined Spanish terms to see their translation and exam tip.
A HRB = 12:30 del 17 de noviembre de 2023, nos encontramos en situación 26° 00,0′ S, 055° 00,0′ W. Navegamos a 10 nudos al rumbo verdadero 135º. A HRB = 22:00 damos rumbo al punto de coordenadas 26° 00,0′ S, 053° 00,0′ W. Calcular el rumbo verdadero que debemos hacer para llegar a dicho punto.At ship’s clock 12:30 on 17 November 2023, we are at 26° 00.0′ S, 055° 00.0′ W. We sail at 10 knots on true course 135º. At 22:00 we set course for 26° 00.0′ S, 053° 00.0′ W. Calculate the true course to reach that point.
Show the answer
Correct answer: a) 031º
Why it is correct
First the 22:00 position: 95 miles at 135º lead to 27º 07.2′ S, 053º 44.9′ W. From there, the course is 031º.
Why the others are not
- b) 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 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 · 2023 · 2ª convocatoria · PY Módulo de navegación · question 20 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.