Wolff, Tatro, and Megehee 



zone formation is highly variable and may often be a function of the 

 direction from the source. In these areas the only reliable method of 

 prediction is to use a computer program, 



BIBLIOGRAPHY 



PUP, Ants T, Precision Sound Velocity Profiles in the Ocean, 

 Volume I, Technical Report No, 3, Columbia University 

 Geophysical Field Station, 1963, 



Ayres, E, , P, M, Wolff, L, Carstensen and H. C. Ayres. A Ray 



Tracing Program for a Digital Computer, Fleet Numerical Weather 

 Facility Informal Manuscript, 1966. 



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