-4- 



and June 1958 was the source of information on the current 

 near Onslow Bay. This cruise was set up to collect data on 

 the behaviour of the meanders in a region where the Gulf Stream 

 flows close to the shore over the Blake Plateau. The size of 

 the meanders in this area is restricted by the continental shelf. 

 One hundred and twenty crossings of the axis of the Gulf Stream off 

 Onslow Bay were made for some thirty consecutive days. Every 

 half hour the temperature was measured to a depth of 200 m with 

 a bathythermograph; at the same time a sample of surface 

 water was taken to be analyzed later for salinity. The current 

 velocity was determined every hour by means of the geomagnetic 

 electrokinetograph (GEK), Each crossing was continued across 

 the current as far as was necessary to define the onshore edge 

 of the band of maximumvelocity. A detailed description of the 

 cruise and the measurements can be found in an article by 

 T. F. Webster (1961a). 



(2) In addition, data taken from cruise 70 of the 

 "Crawford" by T, F. Webster during October and November 1961 

 were used in our computations. Some 70 crossings of the main 

 axis of the stream were made along the SO'-'N parallel off Jacksonville 

 where the stream runs essentially north-south; the technique of 

 measuring temperature, salinity and current velocity was similar 

 to the one described above. 



