UNDERSEA TECHNOLOGY 



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Deep-submergence vehicle ALVIN rigged for a science mission. Drop- 

 pable working tray is shown in place, with mechanical manipulator and 

 bottom working tools for a geologic dive. 



Chemical and electrochemical devices for oxygen replenishment have 

 been developed for limited or unlimited submergence periods. These 

 developments include not only means for oxygen supply alone but also 

 research into devices which provide dual or multiple functions such as 

 CO2 and CO removal. Other important problems include effects of oxygen 

 concentration on combustibility of materials and the characteristics of 

 oxygen and inert gas mixtures, under various conditions of pressure. 

 Regenerative and nonregenerative physical and chemical systems have been 

 developed for removal of carbon dioxide from the submersible atmosphere. 

 Another requirement is the elimination of odors and contaminants such 

 as carbon monoxide, volatile hydrocarbons and organics, aerosols, and 

 particulates. This requirement can be met by physical and chemical 



