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Calcular la situación verdadera de una embarcación que se encuentra dentro de la zona prohibida de pesca a 3,5 millas del faro de Punta de Gracia y en la demora verdadera 084º del faro de Punta Paloma.Inside the prohibited fishing zone at 3.5 miles from Punta de Gracia lighthouse and on true bearing 084º to Punta Paloma lighthouse, what is your true position?
Show the answer
Correct answer: d) l = 36º 03.2' N L = 005º 51.7' W
Why it is correct
Plotting the reciprocal bearing 264º from Punta Paloma (36º 04.0′ N, 005º 43.2′ W) and intersecting it west of Punta de Gracia (inside the prohibited fishing zone) with a 3.5-mile arc from Punta de Gracia (36º 05.4′ N, 005º 48.6′ W) gives l = 36º 03.2′ N, L = 005º 51.7′ W.
Why the others are not
- a) Does not match the intersection inside the prohibited fishing zone SW of Punta de Gracia.
- b) Does not match the intersection inside the prohibited fishing zone SW of Punta de Gracia.
- c) Does not match the intersection inside the prohibited fishing zone SW of Punta de Gracia.
How to work it out in the exam
- Plot the reciprocal bearing 264º from Punta Paloma lighthouse.
- Intersect it in the prohibited fishing zone with a 3.5′ arc from Punta de Gracia: 36º 03.2′ N, 005º 51.7′ W.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de febrero · PER Test 5 · question 44 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.