National Tidal Datum Epoch

Science / Tides and Currents / National Tidal Datum Epoch: The specific l9-year period adopted by the National Ocean Service as the official time segment over which tide observations are taken and reduced to obtain mean values (e.g., mean lower low water, etc.) For tidal datums. It is necessary for standardization because of periodic and apparent secular trends in sea level. The present National Tidal Datum Epoch is 1960 through 1978. It is reviewed annually for possible revision and must be actively considered for revision every 25 years.

Other Words for National

National Noun Synonyms: nationalistic, nationalist, patriotic, jingoistic, chauvinistic
National Adjective Synonyms: nationwide, country-wide, state, governmental, civil, public, popular, federal


Science / Biology / Epoch: Subdivision of a geological period. MORE

National Tidal Datum Convention

Science / Tides and Currents / National Tidal Datum Convention: Effective November 28, 1980, the Convention: (1) establishes one uniform, continuous tidal datum system for all marine waters of the United States, its territories, Commonwealth of Puerto Rico, and Tr MORE

National Market System (NMS)

Business / Finance / National Market System (NMS): Refers to over-the-counter trading. System of trading OTC stocks under the sponsorship of the NASD. Must meet certain criteria for size, profitability and trading activity. More comprehensive informat MORE