Hover or tap underlined Spanish terms to see their translation and exam tip.
Aplicando la fórmula que relaciona la demora, el rumbo y la marcación, si navegando a rumbo verdadero Rv= S53W tomamos una marcación a un punto destacado de la costa 30º por babor, ¿cuál es la demora verdadera a ese punto?Applying the formula linking bearing, course and relative bearing, if sailing on true course S53W we take a relative bearing of 30º to port on a prominent point on the coast, what is the true bearing to that point?
Show the answer
Correct answer: a) 203º.
Why it is correct
S53W is 180º + 53º = 233º. A bearing to port is negative: 233º − 30º = 203º.
Why the others are not
- b) It adds the bearing, when to port it is subtracted.
- c) That is 277º: no correct calculation gives it.
- d) That is 263º: the same mistake as b).
How to work it out in the exam
- Convert the course to circular.
- Apply true bearing = true course + M, with M negative to port.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2026 · Convocatoria de abril · PER Test 1 · question 37 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2026 · Convocatoria de abril · PER Test 3 · question 39 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.