cubic meters per second and the much greater volume of flow found off 

 South Wolf Island in early August, however, should be noted. 



As mentioned previously, the interval of time separating the two 

 partial occupations of the triangle was taken up by standing by a 

 berg until it melted. A series of current measurements was under- 

 taken in the immediate vicinity of the berg to determine, if possible, 

 whether or not the von Arx current meter might have an application 

 in the determination of tidal currents in the open ocean. As it was 

 expected that any tidal current present would have its major com- 

 ponent related in period to a lunar day, it was decided to make hourly 

 current measurements for 25 consecutive hours. These measurements 

 were begun at 1745 (45th meridian time) on 16 July at which time 

 the berg was located at 45°27' N., 47°57' W., just inside the 1,000- 

 fatliom curve. The measurement scheduled for 2245 on 16 July 

 was omitted to permit the greatest freedom in maneuvering the 

 Evergreen because of the presence of other ships in the vicinity. The 



Figure 25. — Successive addition of velocity vectors measured hourly from 2315 

 on 16 July to 2345 on 17 July 1950. Average velocity has been taken for the 

 16-hour period beginning at 0145 on 17 July (45th meridian time has been used). 



82 



