Abstract 



Three oceanogi'iipliic surveys were conducted m the vicinity of the 

 Grand Banks of Newfoundhmd ui support of International Ice Patrol 

 operations 1965. Measiu-enients of temperature ajid salinitj' obtauied 

 from serial Nanseii bottle observations were used to determine tlie 

 dyinimic topography, a principal factor m studyLng the most probable 

 drift of icebergs endangering shipping Lu this area. A short check 

 s»n'\'ey of one standard section was conducted during the season in 

 order to detect any short term changes in the Labrador Current. 

 Subsequent analysis of selected oceanographic sections was ac- 

 complished to calcidate the voliune flow and heat transport througli 

 these sections. In addition, an isentropic analysis was undertaken 

 in order to make a comparison with the circulation deduced from the 

 dynamic topography. 



A change iu vertical sampling technique was attempted in order 

 to define more acciu'ately the ma.ximum and minimum points in the 

 distribution of temperature and salinity. 



Studies of iceberg deterioration and specific drift factors were 

 hiitiated during Ice Patrol 1964 and were conthuied during 1965 with 

 some increase in emphasis. 



