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Nos encontramos situados en la línea de la oposición de los faros: Punta Alcázar - Isla de Tarifa y a 7 millas de distancia del faro de Punta Cires. ¿Cuál será el valor de nuestra latitud?:Located on the opposition line of Punta Alcázar and Isla de Tarifa lighthouses at a distance of 7 miles from Punta Cires lighthouse, what is your latitude?
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Correct answer: b) 35º 58.3' N
Why it is correct
Drawing the opposition line between Punta Alcázar (35º 50.8′ N, 005º 33.4′ W) and Isla de Tarifa (36º 00.0′ N, 005º 36.6′ W) and intersecting it with a 7-mile range arc from Punta Cires (35º 54.7′ N, 005º 28.8′ W) gives latitude l = 35º 58.3′ N.
Why the others are not
- a) Does not match the latitude where the 7-mile arc from Punta Cires intersects the Alcázar–Tarifa opposition.
- c) Does not match the latitude where the 7-mile arc from Punta Cires intersects the Alcázar–Tarifa opposition.
- d) Does not match the latitude where the 7-mile arc from Punta Cires intersects the Alcázar–Tarifa opposition.
How to work it out in the exam
- Draw the line joining Punta Alcázar and Isla de Tarifa lighthouses.
- Intersect it with a 7-mile arc from Punta Cires and read the latitude: 35º 58.3′ N.
Where this question comes from
- Región de Murcia · 2020 · 1ª convocatoria · PER Tipo 1 · question 44 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.