Report No. 4171166 



ASW SONAR 

 TECHNOLOGY REPORT 



ACOUSTIC TRANSMISSION IN AN 

 OCEAN SURFACE DUCT 



REPORT ON AN EXPERIMENT 

 PERFORMED BY 



U. S. NAVY ELECTRONICS LABORATORY 



SAN DIEGO, CALIFORNIA 

 AND ANALYZED BY 



ARTHUR D. LITTLE, INC 



CAMBRIDGE, MASSACHUSETTS 



DEPARTMENT OF THE NAVY 

 NAVAL SHIP SYSTEMS COMMAND 



NObsr-93055 



Project Serial Number SF 101-03-21 



Task 11353 



NOVEMBER 1966 



