chart datum


chart datum
a referenced surface from which soundings or tide heights are calculated, e.g. a tidal datum is the lowest a tide will ever reach (very rarely lower tides are found)

Dictionary of ichthyology. 2009.

Look at other dictionaries:

  • Chart datum — US civil and maritime uses of tidal data A chart datum is the level of water that charted depths displayed on a nautical chart are measured from. A chart datum is generally a tidal datum; that is, a datum derived from some phase of the tide.… …   Wikipedia

  • chart datum — noun the level below which depths are indicated and above which heights of the tides are expressed; usually mean level of low water at a spring tide …   Wiktionary

  • Datum (geodesy) — Geodesy Fundamentals Geodesy · …   Wikipedia

  • datum level — A surface to which elevations, heights, or depths on a map or chart are related. See also altitude …   Military dictionary

  • Nautical chart — A nautical chart is a graphic representation of a maritime area and adjacent coastal regions. Depending on the scale of the chart, it may show depths of water and heights of land (topographic map), natural features of the seabed, details of the… …   Wikipedia

  • Admiralty chart — Admiralty charts are nautical charts issued by the [http://www.ukho.gov.uk UK Hydrographic Office] and subject to Crown Copyright. Over 3,000 charts are available and cover virtually the entire world in various levels of detail depending on the… …   Wikipedia

  • Electronic Chart Display and Information System — An Electronic Chart Display and Information System (ECDIS) is a specific form of computer based navigation information system that complies with International Maritime Organization (IMO) regulations and can be used in lieu of paper navigation… …   Wikipedia

  • Bathymetric chart — A bathymetric chart is the submerged equivalent of an above water topographic map. Bathymetric charts are designed to present accurate, measurable description and visual presentation of the submerged terrain. In an ideal case, the joining of a… …   Wikipedia

  • Operational Navigation Chart — Die Operational Navigation Charts (ONCs) sind eine Serie von über 200 kleinmaßstäbigen Karten (1:1.000.000). Die Karten decken die ganze Erde ab. Allerdings sind einzelne Blätter Nordamerikas, Europas, Asiens und Ozeaniens nicht öffentlich… …   Deutsch Wikipedia

  • CD — • chart datum. • Collateral Duty • compact disc read only memory • Counter Drug • Cut Down, Critical Dimension …   Maritime acronyms and abbreviations


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