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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 ...
Historically, the port was known for its involvement in the export of alum, and the importing of timber, nominally for building ships. [27] Timber, flax and hemp were imported from the Baltic states during the 18th and 19th centuries, but this was to further the shipbuilding, and during the winter months even more importantly, the ship repairing trade due to Whitby's location as a safe port. [28]
The times on the table are related to the high water of the standard port displayed on the table. To calculate the rate at an intermediate tide between neap and spring, interpolation is required. Traditionally this has been done using a "calculation of rates" chart. [3]
After the Dissolution of the Monasteries in 1540, Whitby Abbey and its lands became the property of King Henry VIII with King Street and King's Beck dating from this time. [ 8 ] In the 16th century, Robin Hood's Bay was a more important port than Whitby, it is described by a tiny picture of tall houses and an anchor on old North Sea charts ...
Whitby was called Streanæshalc, Streneshalc, Streoneshalch, Streoneshalh, and Streunes-Alae in Lindissi in records of the 7th and 8th centuries.Prestebi, from Old Norse býr (village) and presta (of the priests), is an 11th-century name.
Tidal range is the difference in height between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun, by Earth's rotation and by centrifugal force caused by Earth's progression around the Earth-Moon barycenter. Tidal range depends on time and location.
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).
The best time to set the clock is at the new moon or the full moon, which is also when the clock can most reliably indicate the actual combined tide. A simple tide clock will always be least reliable near the quarter moon. Tide range is the vertical distance between the highest high tide and lowest low tide.