Hover or tap underlined Spanish terms to see their translation and exam tip.
Seguimos navegando hasta alcanzar la posición C: Latitud: 36º05’N / Longitud: 05º57.4’W, y ponemos rumbo de aguja: 110º. Calcular rumbo verdadero si la declinación magnética es 2º(-) y el desvío es 1º(+).We keep sailing until we reach position C: Latitude 36º05’N / Longitude 05º57.4’W, and set compass course 110º. Calculate the true course if magnetic variation is 2º(-) and deviation 1º(+).
Show the answer
Correct answer: d) 109º
Why it is correct
Total correction = −2º + 1º = −1º. True = compass + total correction = 110º − 1º = 109º.
Why the others are not
- a) It adds the variation instead of subtracting it.
- b) It gets the result wrong by 10º.
- c) It forgets to correct.
How to work it out in the exam
- The position is not needed: it is a distraction.
- True = compass + total correction.
Where this question comes from
- Región de Murcia · 2021 · 1ª convocatoria · PER Tipo 1 · question 44 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.