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Hover or tap underlined Spanish terms to see their translation and exam tip.

A HRB= 1009 el radar les indica que tienen simultáneamente el faro de Cabo Espartel a 5 millas de distancia y el faro del extremo del espigón del Puerto de Tánger a 4 millas y se sitúan en la carta:At HRB 1009, radar simultaneously indicates a distance of 5 miles to Cape Spartel lighthouse and 4 miles to Tangier port breakwater head lighthouse. Plot your position:

Show the answer

Correct answer: b) 35º 50.5' N - 005º 50.6' W

Why it is correct

Swinging a 5-mile compass arc from Cape Spartel lighthouse (35º 47.5′ N, 005º 55.5′ W) and a 4-mile arc from Tangier breakwater lighthouse (35º 47.4′ N, 005º 48.2′ W), both intersect north of the coast at 35º 50.5′ N, 005º 50.6′ W.

Why the others are not

  • a) Does not match the seaward intersection of the 5′ arc from Spartel and 4′ arc from Tangier.
  • c) Does not match the seaward intersection of the 5′ arc from Spartel and 4′ arc from Tangier.
  • d) Does not match the seaward intersection of the 5′ arc from Spartel and 4′ arc from Tangier.

How to work it out in the exam

  1. Swing a 5-mile arc from Cape Spartel and a 4-mile arc from Tangier breakwater.
  2. Read the coordinates of the intersection: 35º 50.5′ N, 005º 50.6′ W.

Where this question comes from

Try it: Navigation calculations

Pending instructor review. Machine translation, not reviewed.