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Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic ...
Hydrographic survey is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, offshore wind farms, offshore oil exploration and drilling and related activities. Surveys may also be conducted to determine the route of subsea cables such as telecommunications cables, cables ...
A nautical chart or hydrographic chart is a graphic representation of a sea region or water body and adjacent coasts or banks. Depending on the scale of the chart, it may show depths of water (bathymetry) and heights of land (topography), natural features of the seabed, details of the coastline, navigational hazards, locations of natural and ...
An electronic navigational chart (ENC) is an official database created by a national hydrographic office for use with an Electronic Chart Display and Information System (ECDIS). [ 1 ] ECDIS and ENCs are the primary means of electronic navigation on cargo ships. [ 1 ] Charts can be used in navigation to provide an indication of location once a ...
The General Bathymetric Chart of the Oceans (GEBCO) is a publicly available bathymetric chart of the world's oceans. The project was conceived with the aim of preparing a global series of charts showing the general shape of the seafloor. Over the years it has become a reference map of the bathymetry of the world's oceans for scientists and others.
The hydrographic Great Basin is a 209,162-square-mile (541,730 km 2) area that once drained internally. All precipitation in the region evaporated, sank underground or flowed into lakes (mostly saline).
The United States Hydrographic Office ( USHO) prepared and published maps, charts, and nautical books required in navigation . The office was established by an act of 21 June 1866 as part of the Bureau of Navigation, Department of the Navy . It was transferred to the Department of Defense on 10 August 1949. The office was abolished on 10 July ...
Website. gov.uk /ukho. The United Kingdom Hydrographic Office (UKHO) is the UK's agency for providing hydrographic and marine geospatial data to mariners and maritime organisations across the world. The UKHO is a trading fund of the Ministry of Defence (MoD) and is located in Taunton, Somerset, with a workforce of approximately 900 staff.