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Layer represents the geographic location of stations at which tidal current
predictions can be generated from historic and active stations. Tidal current predictions are a calculation of what the current direction and speed will be based on the analysis of data collected at these locations. Harmonic stations generate predictions from harmonic constituents from the data analysis; Subordinate stations generate predictions using time and speed adjustment applied to the predictions for a specific harmonic station. CO-OPS offers predicted time and speed of maximum flood/ebb and timing of slack water (no current) and at regular intervals for all stations in NOAA's annually published tidal current tables and in NOAA Current Predictions service of the CO-OPS Tides & Currents website. The CO-OPS site is updated every quarter; during the first two weeks
of January, April, July and October. The quarterly updates may include the addition of new stations, updating subordinate and harmonic stations, and removal of superseded stations. More information can be found at
http://tidesandcurrents.noaa.gov/noaacurrents/Help |