Ten ocean-bottom seismographs were deployed off the Aleutians to monitor 

 local seismic activity before and after the MILROW nuclear experiment 

 of October 1969, and to determine the extent of ])ossible earthquake activity 

 induced by large-yield underground nuclear explosions. Eight of the units 

 were successfully recovered after the event, and data are being analyzed. 



In concert with the Navy program, ARPA is also engaged in other ad- 

 vanced marine science military applications. Areas of particular interest 

 which will be investigated relate to ( 1 ) new technology for floating bases, 

 and (2) the attainment of Arctic mobility over the ice pack and adjacent 

 shores. Projects include — 



(1) The development of an Arctic surface effect vehicle (SEV). 

 The Arctic has been picked for attention liecause of its significance to 

 national security. The polar region will be studied as an operating en- 

 vironment for the SEV and key Arctic technologies will be developed. 

 Conceptual design studies for mission-oriented vehicles will then be 

 initiated; and 



(2) Design and technology studies for floating bases will continue; 

 some 1/100 scale model testing will be carried out with more promising 

 concepts to be tested further at larger scales. 



The United States earnestly hopes for and works toward resolution of 

 the international conflicts which may make defense measures necessary. Until 

 such efforts succeed there is no prudent alternative to the maintenance of 

 adequate protective forces and systems, and ocean science and engineering 

 are essential to enhance the effectiveness of these forces. The military ocean- 

 ography programs are tailored to support particular systems, in geographical 

 areas and on specific time schedules. The challenge to scientists and engineers 

 is to satisfy these overriding primary needs, to insure that the knowledge is 

 advanced and, to the maximum extent feasible, to use the data, technology 

 and research results available from other economic and scientific fields. 



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