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Situados en un punto A de la carta de coordenadas 36º00’N – 005º50’W, se da rumbo necesario para entrar en el puerto de Barbate (Luz Roja del extremo del espigón). ¿Cuánto tiempo tardaremos en hacer este recorrido a una velocidad de 10 nudos?From point A on the chart at 36º 00' N – 005º 50' W, you head for Barbate port (red light at the end of the breakwater) at 10 knots. How long will the run take?
Show the answer
Correct answer: a) 01h 10m
Why it is correct
The distance from 36º 00′ N, 005º 50′ W to Barbate breakwater red light (36º 11.3′ N, 005º 55.3′ W) is 11.7 miles. At 10 knots, the time required is (11.7 / 10) × 60 ≈ 70 minutes = 01h 10m.
Why the others are not
- b) Does not match covering the 11.7 miles to Barbate at 10 knots (1h 10m).
- c) Does not match covering the 11.7 miles to Barbate at 10 knots (1h 10m).
- d) Does not match covering the 11.7 miles to Barbate at 10 knots (1h 10m).
How to work it out in the exam
- Measure on the chart the distance from 36º 00′ N, 005º 50′ W to Barbate: 11.7 miles.
- Divide by 10 knots: 11.7 / 10 = 1.17 h = 01h 10m.
Where this question comes from
- Región de Murcia · 2021 · 3ª convocatoria · PER Tipo 1 · question 42 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.