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A HRB = 09h 00m del 1 de junio de 2025, nos encontramos en situación 15° 10,0′ N, 179° 22,0′ E. Navegamos a 10 nudos a los siguientes rumbos durante los tiempos que se indican: Rv = 135°, durante 4 horas Rv = 090°, durante 3 horas Durante toda la navegación nos afecta una corriente Rc = SE e Intensidad horaria = 3 millas, que se mantiene constante hasta el fin de la navegación. Calcular la situación a HRB = 16h 00m del 01 junio de 2025.At ship’s clock 09h 00m on 1 June 2025, we are at 15° 10.0′ N, 179° 22.0′ E. We sail at 10 knots: true course 135° for 4 hours, true course 090° for 3 hours. Throughout, a current sets SE at 3 miles an hour, constant to the end. Calculate the position at 16h 00m on 1 June 2025.
Show the answer
Correct answer: d) 14º 26.9′ N, 179° 22.4′ W
Why it is correct
40 miles at 135º, 30 at 090º and 21 of current at 135º. Total: 43.1′ S and 73.1′ E. Arrival: 14º 26.9′ N, 179º 22.4′ W.
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 · 2025 · 2ª convocatoria · PY Módulo de navegación · question 20 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.