print email comment close Tides & Currents URL: http://tidesandcurrents.noaa.gov/ Description: Scientific explanation of what causes tides, the history of tidal prediction, machinery used for prediction, how and why water levels are measured, and links to observations and predictions. From the National Oceanic & Atmospheric Administration Service, National Ocean Service. Publisher: United States. National Oceanic and Atmospheric Administration Library of Congress Subject Headings: Hydraulic measurements Ocean currents Tides Water levels LII Database Information: Record 15095 created by Elaine Walker on 08/31/1998 Last modification on 04/18/2006 Published: 08/31/1998   Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/15095