-9- 



255 



IS bubble at the first expansion. Set 



B. 



(1.2) 



^ = T > ^r. = T- > 



so that d and b represent the distance D and B 

 measured in "bubble radii". 



33 ft. 



_i 



D ft 



Sea leue. L 



B.^ ft. 



T'-rr 



w w / / / / ^ y / ^ / ^ / ^ ^ y / / ^ 



The best position of the mine is determined approxi- 

 mately from the equation 



(1.3) 



d = 6.2b + 3.3b^ + .4 

 o o 



(See derivation in part III). Graphs of (1.1) and (1.3) 

 are drawn in figures 1, 2 at the end. 



On the basis of (1.1) and (1.3), the following table 

 can be constructed showing the best location; 



