inch-wide, 59-inch-high, standard electronics 

 racks are available for installation of equip- 

 ment; within the entire pressure hull ap- 

 proximately 20 cubic feet of space are availa- 

 ble for additional equipment. Electrical pene- 

 trations through the pressure hull are pro- 

 vided for additional equipment; these consist 

 of twenty-six, 2-wire (No. 18) AWG circuits 

 and four, 2-wire (No. 16) AWG circuits. Extra 

 leads can be made available by alternate 

 substitution means. 



Lock-out/Lock-in 



A 25-inch-diameter door on the after pres- 

 sure sphere is configured to join with a "man- 

 in-sea" module to provide diver lock-out/lock- 

 in facilities for at least two divers. The mod- 

 ule, when installed, will occupy the enclosed 

 area now available for additional instrumen- 

 tation. A transfer bell may be attached to the 

 bottom hatch of the after pressure sphere for 

 transferring personnel to or from manned un- 

 dersea stations at atmospheric pressure or to 

 rescue personnel from disabled submarines 

 configured to accommodate the transfer bell. 



Payload 



In excess of 2,000 pounds (wet weight) may 

 be carried within the diver module area. A 

 total of 7,000 pounds may be accommodated by 

 relocation of buoyancy (syntactic foam) mate- 

 rial. 



HUMAN CONSIDERATIONS 



Respiration 



Oxygen is carried within the pressure hull 

 in four bottles (0.37 ft^ each at 2,250 psi), two 

 of which are spares. Oxygen is automatically 

 bled into the cabin by a solenoid-actuated 

 differential pressure control switch maintain- 

 ing cabin pressure at 2 inches of water above 

 a 1-atmosphere reference chamber. Carbon 

 dioxide and other contaminants are removed 

 by blowing a portion of the circulated air 

 through lithium hydroxide/activated charcoal 

 cannisters. An emergency blower is available 

 for backup contaminant removal. Cabin pres- 

 sure is monitored and displayed on a gage in 

 the forward sphere. Oxygen and carbon diox- 

 ide partial pressures are detected by sensors 

 and displayed; a red light alarm is activated 

 when these pressures are beyond allowable 



limits (Oj: 140 to 180 mm Hg; COj: 8 mm Hg 

 max.). A Mine Safety Appliance universal kit 

 is carried to identify trace contaminants. 



Temperature/Humidity 



With seawater temperature between 28° 

 and 55°F, cabin temperature is controlled, as 

 explained previously, at 70°F ± 10°F. Relative 

 humidity is maintained at 60% ± 20% by 

 condensation of moisture in the heat exchan- 

 gers. All parts of the pressure hull's interior, 

 with exceptions of the heat exchange portion 

 and hatches, are covered with 5/8-inch-thick 

 polyvinyl chloride (Ensolite) insulation. 



Food/Water 



Normal diving food rations consist of sand- 

 wiches and other foods prepared daily prior to 

 each dive. Emergency dehydrated food is car- 

 ried to sustain four people for 48 hours. Water 

 is carried in plastic containers. 



Waste-Management 



Wide-mouth plastic jars enclosing vinyl bags 

 are carried for collection and storage of liquid 

 and solid wastes. Wescodyne germicide is used 

 as a stabilizing agent and activated charcoal 

 for odor control. A folding camp-type toilet 

 seat with plastic waste bag is carried. 



Fatigue 



Pilot and co-pilot are provided with cush- 

 ioned seats in the forward sphere. No perma- 

 nent facilities are provided for the two observ- 

 ers other than a foam-rubber cushion located 

 on the deck between the pilot and co-pilot 

 upon which the observer may lie to use the 

 forward-looking viewport. The dimensions of 

 the pressure hull are sufficient to provide 

 headroom for standing and stretching. 



EMERGENCY PROCEDURES 



Entanglement 



DEEP QUEST^s streamlined fairings pre- 

 sent minimal entanglement potential. Its ma- 

 nipulators, pan and tilt mechanisms and for- 

 ward instrument brow are jettisonable. All 

 propellers are shrouded and screened to pre- 

 vent entanglement with rope or wire. 



Power Loss 



An emergency power source is carried in- 

 side the pressure hull on each dive. In the 



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