TM Wo. 327 



Table 6. Svmmary of Drogije Data - Transect 5 



'■Dc.uttful. value 



Along transect 5 all drogues indicated a net northerly flow of water out of 

 the Tongue (figure 15)^ Drogue Papa (200 meters) showed an abrupt westward 

 displacement during the last 36 hours of tracking. This was probably due to 

 rather strong winds bloving from the east, which interrupted tracking for a 

 day. The same displacement was noted on drogue Uniform (5OO meters), but was 

 less apparent on drogues November (lOOO meters) and Lima (l400 meters). 

 Average speeds were generally higher along T5 than along T3 (Compare tables k 

 and 6 . ) . 



Drogue current observations taken the previous year (February I962) indi- 

 cated a northerly set at 200 meters with an average speed of 7 cm/sec (reference 

 3, p. A-25). At 500 meters the drogue moved cyclonically, with a net motion 

 toward the west -southwest at an average speed of 6 cm/sec. 



The motions of drogues November, SR-II, and Tango II (all set at 1000 meters) 

 relative to each other were quite different. (See tables h and 6 and the 

 drogue tracks.) In fact, drogues SR-II and November converged, with November 

 moving more than three times as fast. The explanation for this is not known. 

 T?he parachute had not parted from the drogue, as a tension was noted on both 

 drogues upon retrieval. 



Vertical current gradients for T5 are shown in figure 16. 

 negative gradient between 1000 meters and lUOO meters. 



Note the 



DISCUSSION OF RESULTS 



Current speeds at all depths were generally higher along Tl than along T2. 

 The directional motion at 10 and 200 meters was much more uniform along T2 

 than along Tl. In practically all cases, except those previously noted, there 

 was a net in-channel flow. The flow at Tl was apparently related to the flow 

 at T2, but in a complex manner due to the effects of the bounding banks. 



Any influence from the Northwest Providence Channel was not readily 

 apparent from the data; however, since the sill depth of this channel (refer- 

 ence 2) is about 660 meters, it will have little if any effect on the water 

 below 660 meters in the Tongue or in the Northeast Provid'ence Channel. 



lU 



