() Jacques Piccard and Abersold with a hollow glass sphere filled with biological samples and locl<ed out of the vehicle for retrieval by the support ship. (NAVOCEANO) 



presented in Figure 9.19. A list of the atmos- 

 pheric monitoring and instruments and their 

 application is shown in Table 9.7, and the 

 interior layout of the vehicle is in Figure 

 9.20. 



Carbon Dioxide Removal 



Carbon dioxide removal was performed 

 without electric power by absorption on 

 LiOH panels strategically located through- 

 out the vehicle. Diffusive and natural con- 

 vection currents circulated the atmosphere 

 through the panels. Three portable blowers 

 were included as part of the system to be 

 used to aid in circulation during those pe- 

 riods in which natural convection was not 

 adequate. 



Once the vessel was sealed, carbon dioxide 

 readings were taken every 4 hours with a 



Dwyer Analyzer. This instrument failed and 

 a Fyrite Analyzer and a CO2 Drager tube 

 were used instead. 



Oxygen Supply and Regulation 



Oxygen was stored as a cryogenic liquid in 

 two standard Linde LC-3GL cylinders, each 

 holding up to 250 pounds. Operation of the 

 system required that oxygen consumption be 

 greater than normal oxygen boiloff to pre- 

 vent a hazardous buildup in oxygen partial 

 pressure. Normal boiloff is approximately 

 3.75 pounds/tank/day. 



Temperature Control 



Because of moderate Gulfstream tempera- 

 tures (average water temperature 59°F), 

 temperature control for the mission was pas- 

 sive. Using the sea as a heat sink, bare 

 sections of the hull's interior surface con- 

 ducted heat out of the vessel. Internal tem- 



444 



