422 



MARK VI MIXED-GAS BREATHING APPARATUS 



Table 49 



GAS SUPPLY DURATION FOR TEAM 3-Continued 



(Does Not Include All Dives-Gas Mix-85% He 15% O ) 



*Forty minutes, no gas left, was found to be caused by damaged exhaust valve. Diver used his 

 bypass often. 

 ^^Diver used bypass only one time. Check of rig was ok after dive. 



NOTE: Gas supply durations for open circuit using twin 90-cu-ft cylinders was a maximum of 

 Z5 minutes at 205 ft. The gas mix used was 85 He, 15 Oj. 



