As there was little time to plan and to prepare for the 

 cruise, instrumentation for special studies was not attempted. 

 Only standard oceanographic gear such as bathythermographs, 

 Nansen bottles, thermometers, bottom samplers, Secchi disks, 

 and plankton nets were taken. Winches with 1200 feet of 

 3/32-in. wire, the type used for bathythermograph obser- 

 vations, were placed on the CACOPAN and HENDERSON. A 

 spool of 5/32-in. wire, which was to be used for deep sea 

 work, was welded to a warping winch of the CACOPAN. How- 

 ever, this jury rig did not prove to be very satisfactory, 

 so most work was done with the BT winches. 



Data were necessarily collected more or less at random 

 and the areas surveyed were not always critical; even so, 

 much Useful information was obtained about regions that 

 heretofore have been little known. This report concerns 

 some of the results as of 3 1 December 1947. Much of the 

 data are being worked up separately and will be reported 

 elsewhere. 



FIGURE 1. Track chart of the USS 

 CACOPAN and the USS HENDER- 

 SON in the antarctic on Operation 

 HIGHJUMP. The dots mark the noon 

 positions of the ships. 



