WAVE, STATIONARY - A wave of essentially stable form which does not move 

 with respect to a selected reference point. 



WAVE STEEPNESS - The ratio of a wave's height to its length. 



WAVE TRAIN - A series of waves from the same direction. 



WAVE OF TRANSLATION - A wave in which the water particles are permanently 

 displaced to a significant degree in the .direction of wave travel. 

 Distinguished from an OSCILLATORI WAVE. 



VjA.VE, THOGHOIDAL - A progressive oscillatory wave whose form is that of a 

 prolate cycloid or trochoid. It is approximated by vjaves of small 

 amplitude. See also V.AVE, CYCLOIDAL. 



WAVE TROUGH - The lowest part of a wave form between successive crests. 

 Also that part of a wave below still water level. 



WAVE VARIABILITY - (l) The variation of heights and periods between 



individual waves within a wave train, (wave trains are not composed 

 of waves of equal height and period , but rather of heights and 

 periods which vary in a statistical .rianner). (2) The variation in 

 direction of propagation of waves leaving the generating area. 

 (3) The variation in height along the crest. This is usually called 

 "variation along the wave". 



WAVE VELOCITY - The speed with which an individual wave advances. 



WAVE, WIND - A wave that has been formed and built up by the wind. 



WAVES, INTERNAI, - Waves that occur within a fluid whose density changes 

 with depth, either abruptly at a sharp surface of discontinuity 

 (an interface) or gradually. Their amplitude is greatest at the 

 density discontinuity or, in the case of a gradual density change, 

 somewhere in the interior of the fluid and not at the free upper 

 surface where the surface waves have their maximum amplitude. 



WHARF - A s tructure built on the shore of a harbor, river, canal, etc., 

 so that vessels may lie alongside to receive and discharge cargo, 

 passengers, etc, 



WHITECAP - On the crest of a wave, the white froth caused by wind. 



WIND - The horizontal natural movement of airj air naturally in motion 

 with any degree of velocity. 



WIND CHOP - The short-crested waves that raay spring up quickly in a 

 fairly moderate breeze, and break easily at the crest. 



A-iiO 



