followed for many years in military subma- 

 rines and for a number of years in submers- 

 ibles. It is inexpensive and simple to install 

 and maintain the batteries, and, as long as 

 the proper safety precautions in design and 

 operation are always followed, the only ma- 

 jor disadvantages are in degradation of pay- 

 load and decreased internal volume. 



Pressure-Resistant Capsules 



The second option to battery location is 

 installation within a pressure-resistant cap- 

 sule or pod completely independent of the 

 pressure hull (Fig. 7.9). This procedure, 

 adopted by the majority of latter-day sub- 

 mersible builders, was first initiated by 

 Perry Submarine Builders. Anderson et al. 



Fig 7 9 The banery pod of AQUARIUS I 



327 



