Hover or tap underlined Spanish terms to see their translation and exam tip.
Calcular Ra a poner en el timón si salimos de Isla Tarifa en dirección Punta Cires, sabiendo que la corrección total es de CT= -5º.Calculate the compass course (Ra) to steer when departing Isla de Tarifa towards Punta Cires, given a total compass error of CT = –5º:
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Correct answer: d) Ra 137°
Why it is correct
The direct true course from Isla de Tarifa (36º 00.0′ N, 005º 36.6′ W) towards Punta Cires (35º 54.7′ N, 005º 28.8′ W) is Rv = 132º. With CT = −5º, the compass course is Ra = Rv − CT = 132º − (−5º) = 137º.
Why the others are not
- a) Does not subtract the −5º compass error from true course Rv = 132º.
- b) Does not subtract the −5º compass error from true course Rv = 132º.
- c) Does not subtract the −5º compass error from true course Rv = 132º.
How to work it out in the exam
- Measure the true course from Isla de Tarifa to Punta Cires: Rv = 132º.
- Subtract CT = −5º: Ra = 132º − (−5º) = 137º.
Where this question comes from
- Región de Murcia · 2026 · 2ª convocatoria · PER Tipo 1 · question 45 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.