3D datum transformation

3D relative datum method

absolute gravity datum

acceleration datum

Adjustment Datum

Admiralty Chart Datum

algorithm of graded datum subtraction

Altitude Datum

approach to datum by search attack unit {= approach to datum by SAU}

arbitrary datum

armament datum firing

assembly datum graph

assembly datum variation equation

assists datum

assumed datum

assumed vertical datum

assuring rate of depth datum

astrogeodetic datum

astro-geodetic datum orientation

Automatic adjustment of datum line