Hover or tap underlined Spanish terms to see their translation and exam tip.
Vemos el faro de Espartel a 4´por nuestro Sur verdadero y damos rumbo hacia un punto – P – situado a 4´al Norte verdadero del faro Punta Alcázar con velocidad de 7 nudos, ¿Qué tiempo tardaremos en llegar a - P- ?With Cape Spartel lighthouse 4' due South true of you, you head for point P located 4' due North true of Punta Alcázar lighthouse at 7 knots. How long will it take to reach P?
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Correct answer: a) 2h 35m.
Why it is correct
Seeing Cape Spartel 4′ due South of us places us 4′ North of Spartel (35º 51.5′ N, 005º 55.5′ W). From there to P, 4′ North of Punta Alcázar (35º 54.8′ N, 005º 33.4′ W), is 18.1 miles, taking (18.1 / 7) × 60 = 155 minutes = 2h 35m at 7 knots.
Why the others are not
- b) Does not match the time to cover the 18.1 miles between both points at 7 knots.
- c) Does not match the time to cover the 18.1 miles between both points at 7 knots.
- d) Does not match the time to cover the 18.1 miles between both points at 7 knots.
How to work it out in the exam
- Plot the start 4′ North of Spartel and destination P 4′ North of Punta Alcázar; measure 18.1 miles.
- Divide 18.1 miles by 7 knots: 2.585 h = 2h 35m.
Where this question comes from
- Región de Murcia · 2022 · 1ª convocatoria · PER Tipo 1 · question 43 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.