Hover or tap underlined Spanish terms to see their translation and exam tip.
El 27 de enero de 2023, el yate “La Savina” se encuentra en la situación l: 36º 00,0’N y L: 005º 20,0’W navegando al rumbo de aguja (Ra 000º) a una velocidad de 7 nudos. La declinación magnética de la zona es (dm: 3º NW) y el desvío (Δ: 10ºNE). Afectado por una corriente de rumbo S 07º W e intensidad horaria de la corriente (Ihc 7 nudos). Calcular el rumbo efectivo y la velocidad efectiva:On 27 January 2023, the yacht “La Savina” is at l: 36º 00.0’N and L: 005º 20.0’W on compass course 000º at 7 knots. Magnetic variation is 3º NW and deviation 10º NE. Affected by a current setting S 07º W at 7 knots. Calculate the course and speed made good:
Show the answer
Correct answer: b) Course 007º, 0 knots
Why it is correct
Total correction = −3º + 10º = +7º, so true course 007º. The current sets 187º: dead against and at the same speed. The boat makes no way.
Why the others are not
- a) The speeds cancel out.
- c) The speeds cancel out.
- d) The boat’s own heading is the one in b).
How to work it out in the exam
- Draw the two vectors: equal and opposite add to zero.
Where this question comes from
- Región de Murcia · 2024 · 1ª convocatoria · PY Tipo 1 · question 37 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.