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An automatic depth-keeping servo system also was developed for the buoy in con- 

 junction with the above measurement system to determine the feasibihty of this type 

 of device in a varying seaway. 



A second electronic measurement system was developed to measure and indicate the 

 required hydrodynamic characteristics of the buoy necessary for operation of the system 

 during submarine patrols. The quantities measured are displayed as meter readouts and 

 include buoy depth (shallow and deep), cable tension at the submarine, and cable scope 

 (fine and coarse). 



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