equipment enabled sinrultaneous speed and direction readouts thus elim- 

 inating the necessity for manual switching to obtain these readings 

 individually. Estimates of the threshold and accuracy of the instru- 

 ment are 0.2 knot and ±0.1 knot, respectively. Dir^ectional accuracy is 

 within ±20 degrees; average error is ±12 degrees. 



Observational Techniq^ue 



At each anchor station the modified Roberts current meter was 

 lowered to the following observational depths: k, 10, l6, 22, 28, 3k , 

 kO, h6, and 52 meters. Approximately one hour was required to com- 

 plete each vertical series of observations, after which the instru- 

 ment was returned to the 4-meter depth to repeat the series. This 

 procedure was followed through the 25-hour observation period at 

 each station. The uppermost depth of k meters was selected in order 

 to minimize the influence of surface wave action and ship motion 

 which would otherwise be more pronounced if the observations had been 

 made nearer the surface. These data, together with corresponding wind 

 data, are presented in Appendix A. 



The buoyed Japanese current meter was suspended at a depth of 18 

 meters, corresponding approximately to the l6-raeter observational depth 

 used at the anchor stations, and was located 1,000 yards southeast of 

 ARGUS ISLAND from 1 to 15 August, This meter was installed mainly for 

 testing purposes in the hope that supplementary current information 

 would be obtained for correlation with observations taken at the nearby 

 anchor stations. Comparisons of simultaneous current observations at 

 the buoyed meter and each of the anchor stations are discussed below. 

 The Japanese current meter data are presented in Appendix B. 



Supplementary Observations 



In addition to current observations used in this study, a consid- 

 erable amount of oceanographic data was acquired in the region of the 

 Bank during the period of this survey. These supplementary observa- 

 tions, too voltrainous to be treated in this report, include: 



Nansen casts, sound velocity measurements, and bathythermo- 

 graph observations at 28 oceanographic stations over the Bank from 1 

 to 3 August and from 9 to 11 August. 



Three -hourly Nansen casts, hourly bathythermograph observa- 

 tions, and continuous temperature records at 10-foot increments be- 

 tween the surface and bottom during the 25-hour observation period at 

 each anchor station. 



A study of these data in relation to the observed currents is in 



progress. 



