Hover or tap underlined Spanish terms to see their translation and exam tip.
Navegando en un punto de sonda en la carta de 12 metros, ¿cuál de las siguientes respuestas más se aproxima a la sonda en el momento a las 10:40? Se cuenta con la siguiente información: Hora de la pleamar= 06:34 y altura de la pleamar= 1,75m. Hora de la bajamar= 12:40 y altura de la bajamar= 0,25m.Sailing at a point with a charted sounding of 12 metres, which answer is closest to the sounding at 10:40? We have: High water time = 06:34, height 1.75 m. Low water time = 12:40, height 0.25 m.
Show the answer
Correct answer: d) 12.61 metres.
Why it is correct
D = 6h 06m and t = 4h 06m. h = 1.00 + 0.75 × cos(121º) = 0.61 m. Sounding: 12 + 0.61 = 12.61 m.
Why the others are not
- a) It does not match the working.
- b) It does not match the working.
- c) It does not match the working.
How to work it out in the exam
- Find t, the time since the first tide, and D, the duration between them.
- h = mean + (first − second) / 2 × cos(180º × t / D).
- Sounding = charted sounding + h.
Where this question comes from
- Ministerio de Transportes (Madrid) · 2024 · Convocatoria de abril · PY Test 1 · question 34 Official paper · Official answer key
- Ministerio de Transportes (Madrid) · 2024 · Convocatoria de abril · PY Test 2 · question 37 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.