Figure 6. FPMS being readied for deployment. 



Acoustic Arrays 



A number of underwater ranges, most operating as three-dimensional 

 acoustic tracking systems for training and testing of the Fleet and of various 

 weapons systems, are listed in Table 1 . These ranges are located in the nor- 

 thern hemisphere (from Bermuda to Hawaii) and are utilized almost exclusively 

 by the Navy and its contractors. 



The ranges are all similar in makeup; consequently, foundation 

 requirements are much the same. The differences in seaf loor conditions at 

 the various range sites impose differing restrictions on foundation design. 

 Soil conditions at the sites vary from sand with rock outcroppings to what 

 is described as a silt-ooze. 



