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A HRB = 13:00 del 12 de junio de 2026, nos encontramos en situación 28° 44,0′ N, 178° 52,0′ E. Navegamos a 10 nudos a los siguientes rumbos durante los tiempos que se indican: Rv = 280°, durante 7 horas Rv = 360°, durante 3 horas Durante toda la navegación nos afecta una corriente Rc = NW e Intensidad horaria = 3 millas, que se mantiene constante hasta el fin de la navegación. Calcular la situación a HRB = 23:00 del 12 junio de 2026.At ship’s clock 13:00 on 12 June 2026, we are at 28° 44.0′ N, 178° 52.0′ E. We sail at 10 knots: true course 280° for 7 hours, true course 360° for 3 hours. Throughout, a current sets NW at 3 miles an hour, constant to the end. Calculate the position at 23:00 on 12 June 2026.
Show the answer
Correct answer: d) 29° 47.4′ N, 177° 08.8′ E
Why it is correct
70 miles at 280º, 30 at 000º and 30 of current at 315º. Total: 63.4′ N and 90.1′ W. Arrival: 29º 47.4′ N, 177º 08.8′ E.
Why the others are not
- a) It does not match the working.
- b) It does not match the working.
- c) It does not match the working.
How to work it out in the exam
- Break each leg and the current into north-south and east-west.
- Add them. Turn departure into longitude: ΔLong = departure / cos(mean latitude).
Where this question comes from
- Junta de Andalucía · 2026 · 2ª convocatoria · PY Módulo de navegación · question 20 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.