World Tidal Constituents(Sea Level Data)

In 1974 the Canadian Hydrographic Service (CHS) and the Marine Environmental Data Service of the Canadian Department of Fisheries and Oceans(MEDS) undertook to establish and operate a computer bank of tidal constituents for the world's oceans on behalf of the International Hydrographic Organization (IHO). This IHO Tidal Constituent Bank came into full operation in January 1978, and replace the function of the now defunct Special Publication 26 (SP26). The World Tidal Constituent file at JODC is the second released in 1983.