Hover or tap underlined Spanish terms to see their translation and exam tip.
Navegamos al rumbo verdadero 332º y velocidad 8 nudos, nos encontramos en la oposición de los faros de Punta Almina y Punta Europa, y marcamos el faro de Punta Europa en demora de aguja 338º. Calcular la corrección total.Steaming on true course 332º at 8 knots, you cross the opposition line of Punta Almina and Punta Europa lighthouses and observe Punta Europa lighthouse at compass bearing Da = 338º. Calculate the total compass error:
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Correct answer: c) +8º (plus)
Why it is correct
On the opposition line between Punta Almina lighthouse (35º 54.0′ N, 005º 16.5′ W) and Punta Europa lighthouse (36º 06.5′ N, 005º 20.7′ W), the charted true bearing towards Punta Europa is Dv = 346º. Subtracting compass bearing Da = 338º gives total compass error Ct = 346º − 338º = +8º.
Why the others are not
- a) Confuses the ship's course (332º) with the true bearing of the opposition (346º).
- b) Confuses the ship's course (332º) with the true bearing of the opposition (346º).
- d) Confuses the ship's course (332º) with the true bearing of the opposition (346º).
How to work it out in the exam
- Measure on the chart the true bearing from Punta Almina towards Punta Europa: Dv = 346º.
- Subtract the compass bearing: Ct = 346º − 338º = +8º.
Where this question comes from
- Junta de Andalucía · 2020 · Convocatoria de e · PY Módulo de navegación · question 11 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.