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AFT BALLAST TANK 



BALLAST TANK 



BATTERY BOX 

 LIFE SUPPORT 

 COMMUN. UNIT 

 GYRO POWER SUPPLY 

 VARIABLE BALLAST TANK 

 HIGH PRESSURE AIR SUPPLY 



CENTER VIEWPORT 

 FIXED LEAD BALLAST 

 MANIPULATOR 



PORTABLE LEAD BALLAST 



224 



