NAVAL OCEAN SYSTEMS CENTER, SAN DIEGO, CA 92152 



AN ACTIVITY OF THE NAVAL MATERIAL COMMAND 

 SLGUILLE,CAPT, USN HL BLOOD 



Commander 



Technical Director 



ADMINISTRATIVE INFORMATION 



Between May 1973 and October 1975, 460-meter and 1830-meter expendable 

 bathythermograph (XBT) profiles were collected by personnel of the Experimental 

 Acoustics Branch during six propagation-loss experiments. The XBT profiles were made 

 with 1 1 different 460-m and two different 1830-m XBT systems from four ships and two 

 research platforms. Additional independent temperature measurements were made by 

 means of other systems, such as hydrocasts, STD/SV profiling systems, and a thermistor 

 chain system. This collection of measurements provides a data base for several XBT 

 accuracy studies. 



A draft of the manuscript was sent to the Sippican Corporation for review and comment, 

 which are included here following the Recommendations section. 



The work included in this report was supported by the Naval Sea Systems Command, 

 Code 06H1-4, under problem SF 52-552-602, work unit SUIO. This report covers a total 

 work period from May 1971 to December 1977. 



Released by 

 N. O. Booth, Head 

 Environmental Acoustics 

 Division 



Under authority of 

 J. H. Richter, Acting Head 

 Environmental Sciences 

 Department 



AC KN OWLE DGEMENTS 



The author especially acknowledges the detailed and complete technical review of the 

 original manuscript by M. A. Pedersen and R. F. Hosmer of this Center. Their reviews resulted 

 in valuable suggestions, revisions, and additions, many of which were incorporated in the 

 final manuscript. 



Additional tlianks are due O. S. Lee, who, upon the author's retirement, assumed 

 responsibility for sending the manuscript to the Sippican Corporation for their review and 

 attending to all the many details concerning the final editing, publishing, and distribution 

 of the report. 



