175 



In general, velocities were somewhat greater than those 

 obtained from drift cards. This is to be expected because 

 the drogues were observed only over a period of a few hours 

 and usually when onshore winds were blowing, while the 

 drift of cards was a net motion reflecting to some extent 

 opposing land and sea breezes, and tidal and other current 

 action. These limited observations showed no correlation in 

 either direction or velocity with the stage of the tide or 

 with its ebb and flow. 



In seven instances, shallow and and deep drogues were 

 released simultanteously over the shelf, but in only one did 

 the two drogues move with approximately equal velocities. 

 In one case (August 21) the deep drogue moved faster than 

 the shallow one o In all others the speed of the deeper 

 drogue was about half that of the shallow one. Moreover, 

 both shallow and deep drogues travelled in approximately 

 the same direction^ vrfiich can be seen from Table IX. 



On June 11,, two drogues were released just off the 

 Hyperion outfall, one at 15 feet and one at 35 feet below 

 the surface. In this case the surface drogue drifted south 

 and parallel to the shore for two hours, while the deep 

 drogue in one and one-half hours drifted directly shor.eward 

 and ended its course above the end of the Hyperion outfall. 



Drift Card Results 



Introduction 



As a means of determining the drift of surface currents 

 in this area, drift cards have proved to be highly successful, 

 Except for a few localities in the northern and southern ends 



