True position

From International Dictionary of Marine Aids to Navigation
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urn:mrn:iala:dic:15-0-0033

(2D). The error-free latitude and longitude co-ordinates in a specified geodetic datum.

(3D). The error-free latitude, longitude and height co-ordinates in a specified geodetic datum.


Source: Nick Ward, Vicechair, IALA e-Nav Committee, March 2009