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1 of the horizon, the first of the altitude corrections applied to the sextant altitude of a heavenly body. It is the vertical angle at the observer's eye between the horizontal and the line of sight to the visible horizon. Its value depends on the height of eye and the correction is always minus. The correction table given in nautical tables and almanacs is frequently combined with the correction for terrestrial refraction. For illus.

see horizon.

see horizon.

2 When an answering pennant was hoisted at sea, it was hoisted at the dip, that is, halfway up the signal halyards, until the signal received was fully understood.

See also signals at sea.

See also signals at sea.

Mike Richey

Subjects: Maritime History.

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