Hover or tap underlined Spanish terms to see their translation and exam tip.
Navegando al rumbo verdadero (Rv)=046º, a Hrb= 00:00, tomamos demora verdadera del faro de Cabo Espartel (Fl4.20s30M) Dv=078º, y a Hrb=00:20, tomamos demora verdadera del mismo faro Dv = 150º. Si la velocidad del buque es de 12 nudos, ¿cuál es nuestra situación a Hrb 00:20?Steering Rv = 046º at 12 knots, you take Dv Cape Spartel = 078º at Hrb 00:00 and Dv Cape Spartel = 150º at Hrb 00:20. What is your position at Hrb 00:20?
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Correct answer: d) l: 35º 49.5' N L: 005º 56.8' W
Why it is correct
In 20 minutes (00:00 to 00:20) at 12 knots the vessel runs 4 miles along Rv = 046º. Advancing the first bearing line Dv₁ = 078º (reciprocal 258º from Cape Spartel) by 4 miles along 046º to intersect the second bearing Dv₂ = 150º (reciprocal 330º from Spartel) gives l = 35º 49.5′ N, L = 005º 56.8′ W.
Why the others are not
- a) Does not advance the first Cape Spartel bearing 4 miles along Rv = 046º to intersect Dv₂ = 150º.
- b) Does not advance the first Cape Spartel bearing 4 miles along Rv = 046º to intersect Dv₂ = 150º.
- c) Does not advance the first Cape Spartel bearing 4 miles along Rv = 046º to intersect Dv₂ = 150º.
How to work it out in the exam
- Plot the reciprocal bearings 258º and 330º from Cape Spartel lighthouse.
- Advance the first bearing 4 miles (20 min at 12 knots) along 046º to intersect the second: 35º 49.5′ N, 005º 56.8′ W.
Where this question comes from
- Región de Murcia · 2025 · 3ª convocatoria · PY Tipo 1 · question 32 Official paper · Official answer key
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Pending instructor review. Machine translation, not reviewed.