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A HRB= 17:10 tras la entrada a Barbate amarran en el muelle de espera de la Marina y le dan un atraque con sonda de carta= 2,50 m. siendo el calado del yate= 2,50 m. y obtienen del Anuario de Mareas de año en curso los siguientes valores: -Altura bajamar más próxima= 0,87 m. -Corrección aditiva por intervalo de hora de llegada= 0,01 m Con estos datos calculan la sonda bajo quilla en dicho atraque:At ship’s clock 17:10 after entering Barbate they tie up at the Marina waiting quay and are given a berth with a charted sounding = 2.50 m, the yacht’s draught being 2.50 m, and obtain from the current Tide Tables: nearest low water height = 0.87 m; additive correction for the arrival interval = 0.01 m. With this data they work out the water under the keel at the berth:

Show the answer

Correct answer: d) 0.88 m.

Why it is correct

2.50 + 0.87 + 0.01 − 2.50 = 0.88 m.

Why the others are not

  • a) The result is different.
  • b) The result is different.
  • c) The result is different.

How to work it out in the exam

  1. Water under the keel = charted sounding + height of tide − draught.
  2. The height of tide is the low water plus the additive correction from the Anuario.

Where this question comes from

Try it: Tide trainer

Pending instructor review. Machine translation, not reviewed.