Hydrographer :: Hydrographer (n.) One skilled in the hydrography; one who surveys, or draws maps or charts of, the sea, lakes, or other waters, with the adjacent shores; one who describes the sea or other waters..
Hydrography :: Hydrography (n.) The art of measuring and describing the sea, lakes, rivers, and other waters, with their phenomena..
Hydrography :: Hydrography (n.) That branch of surveying which embraces the determination of the contour of the bottom of a harbor or other sheet of water, the depth of soundings, the position of channels and shoals, with the construction of charts exhibiting these particulars..