UNITED STATES DEPARTMENT OF THE INTERIOR 



Walter J. Hickel, Secretary 



Leslie L. Glasgow, Assistant Secretary 



for Fish and Wildlife, Parks, and Marine Resources 



Charles H. Meacham, Commissioner, U.S. FISH AND WILDLIFE SERVICE 



Philip M. Roedel, Director, Bureau of Commercial Fisheries 



Studies on Continuous Transmission 

 Frequency Modulated Sonar 



FRANK J. HESTER, Editor 



United States Fish and Wildlife Service 

 Special Scientific Report--Fisheries No. 607 



Washington, D.C. 

 June 1970 



