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Observed Height

The final, fully corrected sextant height. It is figured by applying the altitude corrections to the apparent height (Ha), or Ho = Ha + altitude corrections. The observed height is the "true" height of the body in that the distance to the geographical position (called the zenith distance of the body) can be found from it: zenith distance = 90° - observed height. See Apparent Height, Sextant Height, and Altitude Corrections.

The observed height (Ho) is always the height of the center of the body sighted.

Abbreviation:  Ho

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