FOR OFFICIAL USE ONLY 



Report No. 4330568 



ASW SONAR 

 TECHNOLOGY REPORT 



THE MEASUREMENT OF 



SOUND SPEED IN THE SEA: 



VELOCIMETERS AND OTHER DEVICES 



by 



H. F. EDEN 



E. M. DUCHANE 



P. VonTHUNA 



R. VanHAAGEN 



ARTHUR D. LITTLE, INC 



CAMBRIDGE, MASSACHUSETTS 



DEPARTMENT OF THE NAVY 

 NAVAL SHIP SYSTEMS COMMAND 



N00024-68-C-1137 

 Task 08648 



MAY 1968 



FOR OFFICIAL USE ONLY 



