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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 ...
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 tide components with a period near twelve hours have a lunar amplitude (Earth bulge/depression distances) that are a little more than twice the height of the solar amplitudes, as tabulated below. At new and full moon, the Sun and the Moon are aligned, and the lunar and the solar tidal maxima and minima (bulges and depressions) add together ...
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Head of tide, tidal limit [2] or tidehead [3] is the farthest point upstream where a river is affected by tidal fluctuations, [4] or where the fluctuations are less than a certain amount. [5] The river section influenced by tides and marine forces but without salinity is a tidal river , while downstream areas are brackish and termed estuaries .
Tidewater was named because it is near the head of the tide of the Alsea River. [2] Tidewater post office was established in 1878. [2] Tidewater is the home of White Wolf Sanctuary, a rescue facility for Arctic wolves. [3]
Marblehead is a coastal New England town in Essex County, Massachusetts, United States, along the North Shore.Its population was 20,441 at the 2020 census. [2] The town lies on a small peninsula that extends into the northern part of Massachusetts Bay.
1921 postcard of the c. 1764 Silas Brooks place, home of Revolutionary War minuteman Luke Brooks.It still stands as of November 2017 [4] at 88–90 Summer Street.. Maynard, located on the Assabet River, was first settled as a farming community by Puritan colonists in the 1600s who acquired the land comprising modern-day Maynard from local Native American tribe members who referred to the area ...