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Correction To Sextant Altitudes

Why Correct Altitude As you have already learnt that the altitudes of the sextant are observed above the visible horizon. Eventually that altitude needs to be converted as an altitude above the rational horizon, which is a line parallel to the sensible horizon, passing through

Bridge Equipments

Sextant A sextant is an instrument used to measure the angle between any two visible objects. Its primary use is to determine the angle between a celestial object and the horizon which is known as the object’s altitude. Using this measurement is known as taking