Figure 18.— Dynamic topography of the sea surface relative to the 1000-decibar 

 surface from data collected 14-17 July 1951. Oceanographic station posi- 

 tions are indicated and the station numbers given at turning points. 



is noted also, that the topography indicates that some of the bergs 

 following the eastern branch would have stranded on the north- 

 eastern shoulder of the Grand Banks between about 48° N., and 

 47°30' N. 



The von Arx current meter was operated on the run from Port 

 Union to the first station of the triangle (number 4560) . As this 

 run was very nearly over the reverse path followed in occupying 

 the first section of the triangle (stations 4560 to 4571) the two 

 sets of current vectors are comparable except as to tim.e. The 

 differences obtained verify the existence here of transitory (prob- 

 ably tidal) currents. 



48 



