Clark and Yarnall 



similar measurements over much longer acoustic paths in the open 

 oceans through which we may hope to study Rossby waves and other 

 large scale phenomena not available in the Straits. Questions must 

 be answered, however , Over longer paths it may be necessary to go to 

 a lower frequency to obtain a usable coherent acoustic signal at the 

 receiver--how low is perhaps the first question that must be answered. 



In addition, technological and logistical problems must be 

 faced. Highly instrumented precision measurements, carefully attended 

 by qualified personnel, are now required. Improved instrumentation 

 must be provided and sampling schemes devised. In the open oceans, 

 stable, long-life fixed installations must be provided for sources 

 and receivers. 



Until our ability to interpret the information provided by 

 the acoustic probe is improved, and the technological problems are 

 reasonably in hand, only additional pilot studies with land-based 

 terminal facilities can be recommended. 



ACKNOWLEDGEMENTS 



Project MIMI, the Straits of Florida acoustic propagation 

 study, is a joint program under the direction of J.C, Steinberg at 

 the University of Miami and T.G. Birdsall at the University of 

 Michigan. The guiding influence of Dr. Steinberg and the very sub- 

 stantial contributions of Dr. Birdsall are gratefully acknowledged. 

 The continued counsel of A.W. Pryce, M.L. Lasky, and A.O. Sykes 

 (U.S. Office of Naval Research) and the sincere interest and contri- 

 butions of Dr. M,J. Jacobson of Rensselaer Polytechnical Institute 

 are also acknowledged with pleasure. Project MIMI is an interdis- 

 ciplinary group effort. The creative energies of a number of scien- 

 tific and technical specialists have been involved in bringing the 

 project to its present stage of development. To our associates in 

 the work, we will simply say that we are thankful for the opportun- 

 ity to prepare this presentation of its results. 



333 



