Hover or tap underlined Spanish terms to see their translation and exam tip.
Encontrándonos al Este del faro de Punta Europa, tomamos demora de aguja al faro de Punta Almina = 187º. Si la variación local es de 2ºNW y el desvío de la aguja es de 5º (-), ¿cuál es nuestra posición en ese momento?While due East of Punta Europa lighthouse, you take a compass bearing of 187º to Punta Almina lighthouse (variation 2º NW, deviation –5º). What is your position?
Show the answer
Correct answer: b) 36º 06.6' N – 005º 16.8' W
Why it is correct
Being due East of Punta Europa lighthouse fixes our latitude at 36º 06.6′ N. With Ct = −2º − 5º = −7º, true bearing to Punta Almina is Dv = 187º − 7º = 180º (due North of Punta Almina, on longitude 005º 16.8′ W).
Why the others are not
- a) Does not match the intersection of the Punta Europa parallel (36º 06.6′ N) and Punta Almina meridian (005º 16.8′ W).
- c) Does not match the intersection of the Punta Europa parallel (36º 06.6′ N) and Punta Almina meridian (005º 16.8′ W).
- d) Does not match the intersection of the Punta Europa parallel (36º 06.6′ N) and Punta Almina meridian (005º 16.8′ W).
How to work it out in the exam
- Draw the parallel due East of Punta Europa (l = 36º 06.6′ N).
- With Ct = −7º, Dv(Almina) = 187º − 7º = 180º ⇒ meridian of Punta Almina (L = 005º 16.8′ W).
Where this question comes from
- Región de Murcia · 2021 · 3ª convocatoria · PER Tipo 1 · question 45 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.