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Calcular la velocidad a poner para hacer el recorrido Tánger - Barbate (extremos de sus respectivos espigones de salida y de llegada) en 2,5 horas:To complete the Tangier–Barbate passage (between their respective breakwater ends) in 2.5 hours, what speed must you set?
Show the answer
Correct answer: a) 9.68 knots
Why it is correct
Measuring on the chart the distance between Tangier breakwater end (35º 47.4′ N, 005º 48.2′ W) and Barbate breakwater end (36º 11.3′ N, 005º 55.3′ W) gives 24.2 miles. In 2.5 hours the required speed is V = 24.2 / 2.5 = 9.68 knots.
Why the others are not
- b) Does not match dividing the 24.2 miles between Tangier and Barbate by 2.5 hours.
- c) Does not match dividing the 24.2 miles between Tangier and Barbate by 2.5 hours.
- d) Does not match dividing the 24.2 miles between Tangier and Barbate by 2.5 hours.
How to work it out in the exam
- Measure the distance between Tangier and Barbate breakwaters: 24.2 miles.
- Divide by 2.5 hours: V = 24.2 / 2.5 = 9.68 knots.
Where this question comes from
- Región de Murcia · 2026 · 1ª convocatoria · PER Tipo 1 · question 44 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.