Hover or tap underlined Spanish terms to see their translation and exam tip.
Navegando en una zona con una declinación magnética (dm) de 2° W y un desvío de la aguja de 4° E, se toma una demora de aguja (Da) de 343° a un punto conocido de la costa. Calcular la demora verdadera (Dv) del punto.Sailing in an area with magnetic variation (dm) of 2° W and compass deviation of 4° E, a compass bearing (Da) of 343° is taken of a known point on the coast. Calculate the true bearing.
Show the answer
Correct answer: c) 345°.
Why it is correct
Total correction: −2 + 4 = +2. True bearing = 343 + 2 = 345.
Why the others are not
- a) That is the uncorrected bearing.
- b) It subtracts the correction.
- d) It adds the deviation alone, with no variation.
How to work it out in the exam
- E is positive, W is negative. Add with signs.
- Compass to true: add the total correction.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de julio · PER Test 2 · question 44 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de julio · PER Test 4 · question 44 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.