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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 ...
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 ...
USS. Hannah. The schooner Hannah was the first armed American naval vessel of the American Revolution, authorized by the Continental Congress and operated by the Continental Army, and is considered by some the first vessel of the United States Navy. [1] She was a fishing schooner owned by John Glover of Marblehead, Massachusetts and was named ...
Rule of twelfths. The rule of twelfths is an approximation to a sine curve. It can be used as a rule of thumb for estimating a changing quantity where both the quantity and the steps are easily divisible by 12. Typical uses are predicting the height of the tide or the change in day length over the seasons.
Tidal range. 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.
Tide. Simplified schematic of only the lunar portion of Earth's tides, showing (exaggerated) high tides at the sublunar point and its antipode for the hypothetical case of an ocean of constant depth without land, and on the assumption that Earth is not rotating; otherwise there is a lag angle. Solar tides not shown.
Lunitidal interval. The lunitidal interval[1] measures the time lag from lunar culmination to the next high tide at a given location. It is also called the high water interval (HWI). [2][3] Sometimes a term is not used for the time lag, but instead the terms age or establishment of the tide are used for the entry that is in tide tables. [4]
Affleck was back in L.A. filming The Accountant 2 and staying in a rental house a few miles from the Beverly Hills mansion the couple bought in 2023 (and which they listed for sale for $68 million ...