TM No. 327 



The flo-w at T2 is related in a complex manner to the flow at Tl, vhich 

 acquires its energy from the Sargasso Sea, It is not apparent from the 

 data how the flows in these different areas are related. 



The water motion at 60O and 15OO meters was not as well defined as the 

 motion at the shallower depths, and average speeds were less than those at 

 10 and 200 meters. 



Drogue 1 (15OO meters) was launched in the northern part of the channel 

 and moved 5.0 kilometers toward 2U2°T (following the bank contours). Drogue 

 SR (1500 meters) was launched in the southern part of the channel and moved 

 cyclonically toward 3^-^-5^T, with a mean displacement of 20.9 kilometers. 

 Drogue Golf (6OO meters) was. launched in the northern part of the channel and 

 moved cyclonically with a mean displacement of 21„i4- kilometers toward 175 °T. 

 Drogue Tango (6OO meters) was launched in the southern part of the channel and 

 had a mean displacement of 3o3 kilometers toward 092°T, (See figure 8.) 



The motion of the 6OO meter and I5OO meter drogues is quite complicated, 

 exhibiting two scales of eddy motion at 6OO meters and one scale of eddy motion 

 at 1500 meters. At 6OO meters the radii of the eddies are 13 kilometers for 

 drogue Golf and 3 kilometers for drogue Tango. At I5OO meters the track of 

 drogue SR had a radius of 13 kilometers. For an average speed of 8 cm/sec 

 the inertia circle had a radius of 12.8 kilometers at 25°20'N, 



However, since drogueS 1 (l500'meters ) and Tango (6OO meters) did not 

 conform to the. motion of drogues SR (15OO meters) and Golf (6OO meters), the 

 presence of an eddy system could not be definitely established. 



Some inaccuracy was expected (as ^ong Tl) in obtaining fixes, since the 

 Decca receivers were being used close to the baseline in the northern part 

 of the channel. The erratic nature of fixes for drogue Foxtrot (lO meters) 

 confirmed this. 



Vertical current gradients were computed from the data obtained along T2, 

 using the same method as with the data from Tl, Transect 2 was also divided 

 into a northern section (drogues Foxtrot, Mike, Golf, and l) and a southern 

 section (drogues 3-11^ Romeo, Tango, and SR)„ 



Drogues along the northern part of the transect indicated a net motion 

 toward the Tongue, with the greatest vertical gradient between 10 and 200 

 meters (figure 9)» This gradient is very doubtful, due to the erratic 

 position fixes on drogue Foxtrot. 



Drogues along the southern part of T2 indicated a net motion into the 

 Tongue at 10 and 200 meters, but at 6OO and I5OO meters the net flow was 

 out of the Tongue. 



