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1 Commander 



U.S. Naval Air Development Center 

 Johnsville, Pennsylvania 



1 Director 



National Bureau of Standards 



Connecticut Ave & Van Ness Street, N. W . 



Washington 25, D. C. 



Attn: Chief of Sound Section 



1 Superintendent 



U.S. Navy Postgraduate School 

 Monterey, California 



1 Commanding Officer 



U.S. Navy Mine Defense Laboratory 

 Panama City, Florida 



1 U. S. Navy SOFAR Station 



APO 856 c/o Postmaster 

 New York, N. Y. 

 Attn: Mr. G. R. Hamilton 



1 Defense Research Laboratory 



University of Texas 

 Austin, Texas 

 Attn: Dr. C.H. McKinney 



1 Institute for Defense Analyses 



Communications Research Division 

 Princeton, New Jersey 



1 Commander 



Submarine Development Group 2 

 c/o Fleet Post Office 

 New York, N. Y. 

 Attn: CDRA. Jerhert 



1 Brown University 



Department of Physics 

 Providence 12, Rhode Island 



1 University of California 



Marine Physical Laboratory of the Scripps Institution 



of Oceanography 

 San Deigo 52, California 

 Attn: Dr. F. N. Spiess 



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