Tsushima Current— A North Pacific Ocean current setting northeastward in tlie East China 

 Sea (in summer) and tlie Sea of Japan. 



type of tide— A classification based on characteristic forms of a tide curve. Quahtatively, 

 when the two hi^ waters and two low waters of each tidal day are approximately equal 

 in height, the tide is considered semidiurnal; when there is a relatively large diurnal 

 inequality in the liigh or low waters or both, it is considered mixed; and when there is 

 only one high water and one low water in each tidal day, it is considered diurnal. 

 Quantitatively (after Marmer, 1951) where the ratio of Kj + Oi to M2 + S2 is less than 

 0.25, the tide is classified as semidiurnal; where the ratio is from 0.25 to 1.5, the tide is 

 mixed; and where greater than 1.5, diurnal. The NOS classifies tides quantitatively. 



U.S. Coast and Geodetic Survey (USC&GS)— A former name of the National Ocean Survey 

 (NOS). The organization was known as: The Survey of the Coast from its founding in 

 1807 to 1836; Coast Survey from 1836 to 1878; and U.S. Coast and Geodetic Surve^ 

 from 1878 to 1970 (from 1965 to 1970, the USC&GS was a component of the 

 Environmental Science Services Administration (ESSA)). In 1970, the USC&GS became 

 NOS, a component of the National Oceanic and Atmospheric Administration (NOAA). 

 NOAA became the successor to ESSA in 1970. 



Vq + u— See equilibrium argument. 



