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Obtener la situación verdadera de una embarcación que se encuentra en la oposición de los faros de Punta Almina y Cabo Negro y una distancia de 4,8 millas de este último.Find the true position of a vessel on the opposition line of Punta Almina and Cabo Negro lighthouses at a distance of 4.8 miles from Cabo Negro:
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Correct answer: c) l = 35º 46.0' N L = 005º 16.6' W.
Why it is correct
Punta Almina (35º 54.0′ N, 005º 16.5′ W) and Cabo Negro (35º 41.3′ N, 005º 16.5′ W) lie nearly on the same meridian. Measuring 4.8 miles from Cabo Negro along the opposition line towards Punta Almina gives l = 35º 46.0′ N, L = 005º 16.6′ W.
Why the others are not
- a) Does not match the point 4.8 miles north of Cabo Negro along the opposition with Punta Almina.
- b) Does not match the point 4.8 miles north of Cabo Negro along the opposition with Punta Almina.
- d) Does not match the point 4.8 miles north of Cabo Negro along the opposition with Punta Almina.
How to work it out in the exam
- Draw the opposition line between Cabo Negro and Punta Almina lighthouses.
- Measure 4.8 miles from Cabo Negro along that line: 35º 46.0′ N, 005º 16.6′ W.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2020 · Convocatoria de diciembre · PER Test 1 · question 44 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2020 · Convocatoria de diciembre · PER Test 4 · question 44 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.