HERSEY: INTRODUCTION TO LOW-FREQUENCY PROPAGATION AND NOISE WORKSHOP 



1) To forecast the performance of existing sonars over 

 the next few hours, tomorrow, next week, next year, 

 and so on 



2) To analyze operations or operational exercises as a 

 means of improving system performance 



3) To analyze the results of acoustic intelligence 



4) To assist in force level trade-off studies 



5) To assist in the identification and selection of 

 new systems design options 



6) To assist in the entire development process after 

 options have been selected for development. 



In formulating objectives within the framework of these purposes, we 

 are driven by scientific or technical opportunities and constraints 

 in the face of the potential enemy's capabilities and characteristics. 



Our investigations can be programmed either to provide a tech- 

 nology base on which new analysis tools or new sonar systems can be 

 developed or they can help develop a needed capability. The U.S. 

 Defense Department has long subdivided these efforts by names such 

 as research, exploratory development, advanced and engineering 

 development, and so on. 



The non-U. S. participants will inevitably hear American partic- 

 ipants refer to these activities by their number, the budget sub- 

 elements 5.1, 6.2, 5.3, and so on. In principle, I believe this work- 

 shop to be concerned with 6.1, 6.2, 5.3, 6.4, and 6.6. In practice 

 we hear little of 5.6, and so far as I am aware, have no programs 

 whatever in 5.4. For the remainder, I find it easier to divide our 

 concerns into 6.1, 6.2, and 5.3 as follows. In 6.1, we should study 

 acoustic and oceanic processes and how they interact. In 6.2, 



