This volume is one of a series of survey reports prepared for the Office of Naval Re- 

 search by technical advisory panels of The National Research Council Committee on 

 Undersea Warfare. 



Publication has been authorized under contract N7 orr-291, Task III between the 

 Office of Naval Research and The National Academy of Sciences. All inquiries concerning 

 this report should be addressed to the Committee on Undersea Warfare, National Research 

 Council, Washington, D. C. or to the Chief of Naval Research, Navy Department, 

 Washington, D. C. 



PANEL MEMBERS 



Donald B. Lindsley, Chm. 

 James D. Hardy 

 Francis W. Irwin 

 William E. Kappauf, Jr. 

 John L. Kennedy 

 Clifford T. Morgan 

 W. Dewey Neff 

 S. Smith Stevens 



COMMITTEE MEMBERS 



John T. Tate, Chm. 



Gay lord P. Harnwell, Dey. Chm. 



John S. Coleman, Exec. Sec. 



Harvey Brooks 



Eugene F. DuBois 



William V. Houston 



Frederick V. Hunt 



Walter S. Hunter 



Columbus O'D. Iselin 



PhiUip M. Morse 



Lyman Spitzer, Jr. 



