Norwegian Hydrographic Service was created in 1932.
Norwegian Hydrographic Service ended in 1986.
United Kingdom Hydrographic Office was created in 1795.
Pakistan Navy Hydrographic Department was created in 1959.
One thing that hydrographic surveys are used to find is the depth of the water. Hydrographic surveys are also used in order to identify objects in the water.
Correction: What is hydrographic datum? not "hydrography"
Kurt J. Schnebele has written: 'Application of Loran-C positioning to hydrographic surveying' -- subject(s): Loran, Hydrographic surveying
George Stephen Ritchie has written: 'The Admiralty chart' -- subject(s): Great Britain, Great Britain. Hydrographic Office, Hydrographic surveying
Mary Blewitt has written: 'Surveys of the seas' -- subject(s): Great Britain, Great Britain. Hydrographic Dept, History, Hydrographic surveying, Nautical charts
It would be the hydrographic map of Mexico.
aquatic, hydrographic, nautical, seafaring, seagoing, oceanic
Finding out what objects are in a body of water by using sound waves.