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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).
Tide range is the vertical distance between the highest high tide and lowest low tide. The size of the lunar tide compared to the solar tide (which comes once every 12 hours) is generally about 2 to 1, but the actual proportion along any particular shore depends on the location, orientation, and shape of the local bay or estuary.
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.
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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 ...
Seymour Narrows is a 5-kilometre (3.1 mi) section of the Discovery Passage in British Columbia known for strong tidal currents. [1] Discovery Passage lies between Vancouver Island at Menzies Bay, British Columbia and Quadra Island except at its northern end where the eastern shoreline is Sonora Island.
Location: British Columbia: Coordinates: 1]: Type: Fjord lake and Tidal lake: Primary inflows: Pitt River: Primary outflows: Pitt River: Basin countries: Canada: Max. length: 24 km (15 mi): Max. width: 4.5 km (2.8 mi): Surface area: 53.5 km 2 (20.7 sq mi): Max. depth: 150 m (490 ft): Surface elevation: 3 m (9.8 ft) [2]: Islands: Goose, Little Goose, Gosling: References: [1]: Pitt Lake is the ...