(;i:m:k vi, bibuo<;r\piiy 



309 



Bib. No. 



20.025 C 

 20.02C. ( ' 



20.027 C 



20.028 C 



20.029 C 



20.030 C 



Title 



20.000 UNDER-WATER SOUND 



Prediction of Sound Ranges from Bathythermograph 

 Observations. (Rules for Preparing Sonar Messages.) 

 Preliminary Report on the Sonic Ray Plotter. 



Current Methods for Prediction of Maximum Sound 

 Ranges. 



The Attenuation of Sound in the Sea. 



The Sonic Rav Plotter. 



Sound Ranges under the Sea. (Revision of Report 

 dated June 5, 1942.) 



20.031 C Prediction of Sonic and Supersonic Listening Ranges. 



20.032 C Relation Between Scattering & Absorption of Sound. 



20.033 C Coherence of CW Reverberations. 



20.034 C Distribution of Amplitude if Two Rays with Random 



Phase and Given Amplitude Distributions Interfere. 



20.035 C Fluctuations of Transmitted Sound in the Ocean. 



20.036 C Lloyd Mirror Effect in the Presence of a Temperature 



Gradient. 



20.037 C Change of Average Peak Echo Intensity with Chang- 



ing Ping Length. 



20.038 C The Wave Equation with Gravitational Terms. 



a TM 11-486 (Apr. 25, 1945) together with TM 11-487— "Electrical Communication Systems Equipment." (Oct. 2, 1944) supersedes TM 



11-486 (Feb. 25, 1944). 

 b See also 1.012 Part I. 

 "See also 1.012 Parts I, VIII, and XIV. 

 dSeealso 1.012 Part IV. 



«See also 1.012 Parts III and IX, 5.049, 15.016, and 17.073. 

 'See also 1.012 Part XII and XIII, 6.028, 6.031, and 6.037. 

 SSee also 1.012 Part VI and 6.035. 



n See also 1.012 Parts V, VII, XII, and XV, 1.014 and 8.028. 

 'See also 1.012 Part II, 17.061 and 17.0S1. 

 i See also 13.012. 

 k See also 6.035 and 11.003. 



