Sight reduction

Marcq St Hilaire intercept for the line of position

Sight reduction, is the process of deriving from a sight the information needed for establishing a line of position.

Sight is defined as the observation of the altitude, and sometimes also the azimuth, of a celestial body for a line of position; or the data obtained by such observation.

单词	Sight reduction
释义	Sight reduction 英语百科 Sight reduction Sight reduction, is the process of deriving from a sight the information needed for establishing a line of position. Sight is defined as the observation of the altitude, and sometimes also the azimuth, of a celestial body for a line of position; or the data obtained by such observation.
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