DESCRIPTION OF CRUISES 



21 



Heavy weather again interfered with vertical work, and, since the N ioo H nets had 

 been shown to be the most efficient for the capture of Euphausians, it was decided to 

 run a series of N ioo H stations out from the coast and back again with a view to 

 obtaining a knowledge of the distribution across the whaling area: Sts. 32-38 were 

 accordingly made. Sts. 40, 41, 43 and 44 were also N 100 H stations. Following St. 41 

 the ship was anchored in a depth of 272 m., by means of the trawl warp, with the inten- 

 tion of making repeated vertical observations over a period of 24 hours, partly in order 

 to study any changing conditions, including the vertical migration of the plankton, and 



38° 



37° 



36° 



54 



55' 



35 



37. 



33,;; 



34,/"' 

 ,;>36 ,' 



17 



21 



20 



> / 15,' 

 38' 



.•'16 

 •44 



14* '4i/'; 



,'43-/ 25 >32 

 l3 V--24 / 

 23 31 



54 



55 



38° 



37° 



36° 



Fig. 12. Chart showing position of plankton stations taken at South Georgia in March and April 1926. 



partly to provide a control check upon the validity of the data obtained when single 

 vertical observations were made. 



Vertical hauls were made at 1300 o'clock and repeated at 1600, 1700, 2000 and 

 2100 o'clock, when operations were terminated by the sudden onset of a gale. Con- 

 tinued rough weather prevented further plankton work until the ship sailed for the 

 Falkland Islands on April 21. 



