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Navegando en aguas cercanas a Barbate, a Hora Reloj Bitácora (HRB)= 0930, nos encontramos proa a la línea de la enfilación de los faros de Trafalgar y Roche. ¿Cuál será en ese momento nuestro rumbo verdadero?Sailing near Barbate at 09:30 ship’s time, your bow is pointed directly along the leading line (enfilación) of Trafalgar and Cabo Roche lighthouses. What is your true course?
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Correct answer: b) 323º
Why it is correct
The leading line from Cape Trafalgar lighthouse (36º 11.0′ N, 006º 02.0′ W) towards Cabo Roche lighthouse (36º 17.7′ N, 006º 08.4′ W) has a true bearing of 323º.
Why the others are not
- a) Does not match the true bearing of the Trafalgar–Cabo Roche leading line measured on the chart (323º).
- c) Does not match the true bearing of the Trafalgar–Cabo Roche leading line measured on the chart (323º).
- d) Does not match the true bearing of the Trafalgar–Cabo Roche leading line measured on the chart (323º).
How to work it out in the exam
- Join Cape Trafalgar lighthouse to Cabo Roche lighthouse on the chart.
- Transfer the line to the compass rose: heading towards Cabo Roche gives Rv = 323º.
Where this question comes from
- Región de Murcia · 2019 · 1ª convocatoria · PER Tipo 1 · question 42 Official paper · Official answer key
- Región de Murcia · 2026 · 1ª convocatoria · PER Tipo 1 · question 45 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.