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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 ...
The Port Townsend Ship Canal (also known as the Portage Canal) is a 4,800-foot (1,500 m) canal connecting Port Townsend Bay and Oak Bay in Jefferson County, Washington. Built in 1915, the canal separates Indian Island from the Quimper Peninsula of mainland Washington. State Route 116 crosses the only bridge over the canal. There are no locks.
Admiralty Inlet Admiralty Inlet seen at low tide from Whidbey Island Port Townsend, Admiralty Inlet and Port Townsend Bay. Admiralty Inlet is a strait in the U.S. state of Washington connecting the eastern end of the Strait of Juan de Fuca to Puget Sound. It lies between Whidbey Island and the northeastern part of the Olympic Peninsula.
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 Point Wilson Light is an active aid to navigation located in Fort Worden State Park near Port Townsend, Jefferson County, Washington. [3] It is one of the most important navigational aids in the state, overlooking the entrance to Admiralty Inlet, the waterway connecting the Strait of Juan de Fuca and Puget Sound.
Port Townsend Bay, also called Port Townsend, [1] is a marine inlet off Admiralty Inlet at the northeastern extreme of the Olympic Peninsula in the U.S. state of Washington. It was named Port Townsend by George Vancouver in 1792. The name Port Townsend Bay is sometimes used to distinguish the bay from the city of Port Townsend on its ...
Tide flow information is most commonly seen on nautical charts, presented as a table of flow speeds and bearings at hourly intervals, with separate tables for spring and neap tides. The timing is relative to high water at some harbour where the tidal behaviour is similar in pattern, though it may be far away.