Hover or tap underlined Spanish terms to see their translation and exam tip.
Encontrándonos en la enfilación Faro de Cabo Trafalgar-Cerro del Puerco, obtenemos demora de aguja al Faro de Punta de Gracia” N89E. La declinación magnética es 1º(W) y el desvío 2º(E). Determinar la situación verdadera.On the leading line (enfilación) of Cape Trafalgar lighthouse and Cerro del Puerco, you observe Punta de Gracia lighthouse at compass bearing N89ºE (variation 1º W, deviation 2º E). Find your true position:
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Correct answer: b) l = 036º 05.5' N; L: 006º 04.4' W.
Why it is correct
Total compass error is Ct = −1º + 2º = +1º, so the true bearing to Punta de Gracia lighthouse (36º 05.5′ N, 005º 48.6′ W) is Dv = 089º + 1º = 090º (parallel 36º 05.5′ N). Intersecting that parallel with the Cerro del Puerco–Cape Trafalgar leading line gives l = 36º 05.5′ N, L = 006º 04.4′ W.
Why the others are not
- a) Does not match the intersection of parallel 36º 05.5′ N with the Cerro del Puerco–Trafalgar leading line.
- c) Does not match the intersection of parallel 36º 05.5′ N with the Cerro del Puerco–Trafalgar leading line.
- d) Does not match the intersection of parallel 36º 05.5′ N with the Cerro del Puerco–Trafalgar leading line.
How to work it out in the exam
- Compute Ct = +1º and Dv(Punta de Gracia) = 089º + 1º = 090º (parallel 36º 05.5′ N).
- Intersect that parallel with the line through Cerro del Puerco and Trafalgar light: 36º 05.5′ N, 006º 04.4′ W.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2026 · Convocatoria de junio · PER Test 1 · question 42 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2026 · Convocatoria de junio · PER Test 2 · question 45 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.