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  2. Tide table - Wikipedia

    en.wikipedia.org/wiki/Tide_table

    Tide tables, sometimes called tide charts, are used for tidal prediction and show the daily times and levels of high and low tides, usually for a particular location. [1] Tide heights at intermediate times (between high and low water) can be approximated by using the rule of twelfths or more accurately calculated by using a published tidal ...

  3. Tide-Predicting Machine No. 2 - Wikipedia

    en.wikipedia.org/wiki/Tide-Predicting_Machine_No._2

    Assuming the factors for a location are known, configuring the machine to compute tides for the location requires 2.5–4 hours. Predictions for a year’s tides at that location can then be produced in 8–15 hours. [6] The calculations Tide-Predicting Machine No. 2 can perform in 1 day would require a person 125 days to perform by hand. [2]

  4. Tide - Wikipedia

    en.wikipedia.org/wiki/Tide

    The main patterns in the tides are the twice-daily variation; the difference between the first and second tide of a day; the spring–neap cycle; the annual variation; The Highest Astronomical Tide is the perigean spring tide when both the Sun and Moon are closest to the Earth.

  5. Theory of tides - Wikipedia

    en.wikipedia.org/wiki/Theory_of_tides

    High and low tide in the Bay of Fundy. The theory of tides is the application of continuum mechanics to interpret and predict the tidal deformations of planetary and satellite bodies and their atmospheres and oceans (especially Earth's oceans) under the gravitational loading of another astronomical body or bodies (especially the Moon and Sun).

  6. Cooperative Observer Program - Wikipedia

    en.wikipedia.org/wiki/Cooperative_Observer_Program

    It was a backbone of the U.S. climatological observation network and remains an important network in providing long-term observations of particular locations. The Cooperative Weather Observer network consists of manual observations of only a few variables and consists of daily summaries rather than being continuous (i.e. real-time).

  7. Standard port - Wikipedia

    en.wikipedia.org/wiki/Standard_port

    These predictions are given in feet or meters, with respect to the chart datum for average meteorological conditions. [2] Some examples of primary ports are Bhavnagar, Bombay, Cochin, Manila, Karachi, Singapore, Suez, Port Dickson, etc. Standard ports are marked in bold letters in the Index pages of Admiralty Tide Tables (or Tidal almanac). [3 ...

  8. Chart datum - Wikipedia

    en.wikipedia.org/wiki/Chart_datum

    A chart datum is the water level surface serving as origin of depths displayed on a nautical chart and for reporting and predicting tide heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. [1] Common chart datums are lowest astronomical tide (LAT) [1] and mean lower low water (MLLW).

  9. Lunitidal interval - Wikipedia

    en.wikipedia.org/wiki/Lunitidal_interval

    Tide tables forecast the time of the next high water. [6] [7] The difference between these two times is the lunitidal interval. This value can be used to calibrate tide clock and wristwatches to allow for simple but crude tidal predictions. Unfortunately, the lunitidal intervals vary day-by-day even at a given location.