work summary 



During the two-month cruise in the summer of 1949, systematic measurements were 

 made during a survey from the vicinity of St. Lawrence Island to Bering Strait, several 

 surveys in Bering Strait, two surveys northward from the Strait, and the return survey 

 from Bering Strait to Unimak Pass. The temperature, salinity, and density of the water 

 were established, and the distribution, movements, and interaction of the water masses 

 investigated. 



The scientific group aboard HMCS CEDARWOOD was made up of J. P. Tully, A. J. 

 Dodimead, and R. H. Herlinveaux of the Pacific Oceanographic Group of Canada, and 

 E. C. LaFond, R. M. Lesser, J. C. Roque, and J. F. T. Saur, of the U. S. Navy Electronics 

 Laboratory. F. G. Barber and G. L. Pickard of University of British Columbia, though 

 primarily participating in the shore station program at Wales, assisted with observations 

 while on board. 



preface 



During the months of July and August, 1949, the U. S. Navy Electronics Laboratory 

 and the Canadian Pacific Oceanographic Group collaborated in a varied program of 

 acoustical and oceanographic research, mainly in the Bering and Chukchi Seas. This 

 joint venture was made possible through the cooperation of agencies of the Canadian 

 and United States Navies who furnished the vessels and necessary funds for the cruise. 



Oceanographic measurements aboard the United States vessels were taken 

 primarily for the valuation of experimental sound-transmission and sound-propagation 

 data. The collection of sound data took priority, and oceanographic data could be 

 collected only when no interference with sound experiments was assured. The time of 

 the Canadian vessel was devoted exclusively to oceanography, and the data collected 

 by this ship are intended to supplement our present knowledge of the physical and 

 chemical characteristics of Arctic waters. 



The expedition was made by three ships which formed a small task group under 

 the military command of Commander John D. Mason, USN. Dr. Waldo K. Lyon of the 

 Navy Electronics Laboratory directed the entire acoustic and oceanographic program, 

 with Dr. J. P. Tully of the Pacific Oceanographic Group as senior scientist in charge of 

 the Canadian Group. 



Participating ships were: 



USS BAYA (AG(SS) 318), under the command of CDR John D. Mason, USN; 



HMCS CEDARWOOD, under the command of LCDR J. E. Wolfenden, RCN(R); 



USS EPCE(R) 857,* under the command of LCDR D. J. McMillan, USN. 



The oceanographic program was divided into three major parts: 



1. Physical oceanographic studies. These were carried on primarily aboard 

 HMCS CEDARWOOD and from a shore station at Cape Prince of Wales. Some supple- 

 mental data were collected aboard USS EPCE(R) 857 and USS BAYA. 



2. Oceanographic measurements as adjuncts to, and in support of, sonar work. 

 These measurements were taken from USS BAYA and USS EPCE(R) 857. 



3. Sea floor and biological studies. This work was primarily conducted aboard 

 USS EPCE(R) 857, with some additional work on HMCS CEDARWOOD. 



* Now designated USS PCER 857. 



MBL/WHOI 



0301 0072336 fi 



