Hover or tap underlined Spanish terms to see their translation and exam tip.
Una embarcación se encuentra en l=36° - 04,0' N y L=006° - 05,0' W, navegando al norte verdadero a 12 nudos. Calcular la situación tras 30 minutos navegando a ese rumbo y velocidad.A boat is at l=36° - 04.0' N and L=006° - 05.0' W, sailing true north at 12 knots. Calculate the position after 30 minutes on that course and speed.
Show the answer
Correct answer: a) l= 36° - 10.0' N L=006° - 05.0' W.
Why it is correct
Heading true north, longitude does not change. 30 minutes at 12 knots is 6 miles, which is 6′ of latitude.
Why the others are not
- b) The working gives 36º 10′ N, 006º 05′ W, and this option does not match.
- c) The working gives 36º 10′ N, 006º 05′ W, and this option does not match.
- d) The working gives 36º 10′ N, 006º 05′ W, and this option does not match.
How to work it out in the exam
- Find the true course: true = compass + total correction.
- Distance = speed × time.
- Draw the course on the chart, measure the distance and read the position.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de abril · PER Test 3 · question 44 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2021 · Convocatoria de abril · PER Test 5 · question 44 Official paper · Official answer key
Try it: Navigation calculations
Pending instructor review. Machine translation, not reviewed.