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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. 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).

  4. Skookumchuck Narrows - Wikipedia

    en.wikipedia.org/wiki/Skookumchuck_Narrows

    Skookumchuck Narrows [1] is a strait forming the entrance of Sechelt Inlet on British Columbia's Sunshine Coast in Canada. Before broadening into Sechelt Inlet, all of its tidal flow together with that of Salmon Inlet and Narrows Inlet must pass through Sechelt Rapids. At peak flows, standing waves, whitecaps, and whirlpools form at the rapids ...

  5. Tide - Wikipedia

    en.wikipedia.org/wiki/Tide

    The water stops rising, reaching a local maximum called high tide. Sea level falls over several hours, revealing the intertidal zone; ebb tide. Oscillating currents produced by tides are known as tidal streams or tidal currents. The moment that the tidal current ceases is called slack water or slack tide. The tide then reverses direction and is ...

  6. Tide-predicting machine - Wikipedia

    en.wikipedia.org/wiki/Tide-predicting_machine

    The first tide predicting machine (TPM) was built in 1872 by the Légé Engineering Company. [11] A model of it was exhibited at the British Association meeting in 1873 [12] (for computing 8 tidal components), followed in 1875-76 by a machine on a slightly larger scale (for computing 10 tidal components), was designed by Sir William Thomson (who later became Lord Kelvin). [13]

  7. Hopewell Rocks - Wikipedia

    en.wikipedia.org/wiki/Hopewell_Rocks

    Visitors are advised to stay for a full tidal cycle to get a full appreciation of the tides and formations. Although the tides vary from day to day, the high tide can be as high as 16 metres (52 ft) giving the Hopewell Rocks one of the highest average tides in the world. [2]

  8. Northumberland Strait - Wikipedia

    en.wikipedia.org/wiki/Northumberland_Strait

    The Northumberland Strait varies in depth between 17 and 65 metres, with the deepest waters at either end. The tidal patterns are complex; the eastern end has the usual two tides per day, with a tidal range of 1.2 to 1.8 metres, while the western end effectively has only one tide per day.

  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.