U. Se Navy Hydrographic Office. HE transects across the Antarctic 

 Convergence Zone are presented in this report as cross sections. 



Bottom samples were collected by Phleger corers, a Kulleriberg-type 

 corer with a U~ inch-diameter plastic barrel, and an Orange-peel grab 

 sampler. All samples thus obtained vere returned to this Office for 

 laboratory analyses. Forty-eight samples were taken in the Ross Sea, 

 McMurdo Sound, Amundsen and Bellingshausen Seas, and the Palmer Peninsula 

 area. Results of these analyses are listed in APPENDIX B. Numerous rock 

 samples vere obtained from various islands and other locations in the 

 Antarctic. 



Ice observations were made aboard all icebreakers by the BT team at 

 hourly intervals and the aerographers at 3-hour intervals. These obser- 

 vations include ice concentration, thickness, age, and type, and are 

 presented graphically for different areas and periods. In addition, the 

 ships' quartermasters made regular ice observations and entered concen- 

 trations in the ships' logs. 



Meteorological and sea and swell observations were made from 1- to 

 3-hour intervals by aerographers assigned to each icebreaker. These 

 data were recorded on standard WBAN forms and forwarded to the National 

 Weather Record Center, Asheville, North Carolina. Surface weather obser- 

 vations also vere taken during each Nansen cast (APPENDIX A) and BT 

 lowering. 



Continuous underway soundings by UQN-1B echo sounders were made by 

 all ships. In addition, a detailed sounding program was accomplished 

 around Scott and Peter I Islands. A sounding track was made to the 

 west of Coulman Island in the Ross Sea and along the Thurston Peninsula 

 in the Amundsen and Bellingshausen Seas, where no soundings previously 

 had been made. Echograms and sounding journals were forwarded to the 

 Hydrographic Office for incorporation into new and revised nautical 

 charts. 



Continuous air/sea temperature measurements were made with resist- 

 ance bulb thermometers and recorded by a k- channel Brown recorder. The 

 sea element was trailed just below the water surface, and the air 

 element was installed above the main deck level. Measurements were 

 made by the EASTWIND in the Antarctic and Pacific between Panama, 

 Australia, and Tasmanian Sea; BURTON ISLAND, along the western coast 

 of South America into the Bellingshausen Sea and return to United 

 States; and GLACIER, from New Zealand to the ice in the Amundsen Sea, 

 and from the Bellingshausen Sea north along the east coast of South 

 America to the Sargasso Sea. A portion across the Antarctic Convergence 

 in the Drake Passage is included in this report. All records are on 

 file in the U. S. Navy Hydrographic Office. 



