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THE NAVY OCEAN ENGINEERING PROGRAM 



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Complete Advanced Diving System (ADS IV), showing the spherical PTC mated 

 to the DDC. The system is self-contained and highly portable, and can be used any- 

 where in the world. 



(ADS IV), when used with decompression tables presently under develop- 

 ment will enable Navy salvage divers to dive anywhere on the continental 

 shelves. 



ADS IV consists of two basic components: the PTC and the DDC. The 

 PTC is a single spherical chamber which locks on to the DDC. This ar- 

 rangement allows two fully equipped divers to accomplish their decom- 

 pression in the three-lock DDC, in which they can be comfortably sup- 

 ported during extended decompression. In addition, this technique frees 

 the PTC for immediate reuse by a second crew of divers. The ADS IV unit 

 is materially certified safe for Navy personnel to 600 ft. Self-contained 

 oxygen, battery power, and a carbon dioxide removal system permit hours 

 of life support without external assistance. 



The PTC is a single, 6000 pound, pressure-proof, hehum-tight spherical 

 compartment on a support frame. This support frame is designed to pro- 

 vide easy entry to and exit from the PTC for the divers when it rests on the 

 bottom. 



