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Navegando al rumbo verdadero 105º, tomamos simultáneamente marcación al Faro de Punta Camarinal = 43º Babor y marcación al Faro de Punta Malabata = 35º Estribor. Calcular la situación.Steering true course 105º, you take simultaneous relative bearings of Punta Camarinal = 43º Port and Punta Malabata = 35º Starboard. Calculate your position:
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Correct answer: c) 36º 01.6' N, 005º 57.5' W
Why it is correct
With Rv = 105º: Dv(Camarinal) = 105º − 43º = 062º and Dv(Malabata) = 105º + 35º = 140º. Plotting the reciprocals 242º from Punta Camarinal and 320º from Punta Malabata intersects at 36º 01.6′ N, 005º 57.5′ W.
Why the others are not
- a) Does not match the intersection of Dv = 062º to Camarinal and Dv = 140º to Malabata.
- b) Does not match the intersection of Dv = 062º to Camarinal and Dv = 140º to Malabata.
- d) Does not match the intersection of Dv = 062º to Camarinal and Dv = 140º to Malabata.
How to work it out in the exam
- Compute the true bearings: Dv(Camarinal) = 105º − 43º = 062º and Dv(Malabata) = 105º + 35º = 140º.
- Plot both bearings on the chart and read the intersection: 36º 01.6′ N, 005º 57.5′ W.
Where this question comes from
- Junta de Andalucía · 2016 · 1ª convocatoria · PER Modelo A · question 43 Official paper · Official answer key
- Junta de Andalucía · 2016 · 1ª convocatoria · PER Modelo B · question 45 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.