Table 9. Continued 



Characteristics 



TEMP Threshold 



Manufacturer 

 Specification 



Test Results 



2. Operational Suitability 









Life 



7 years 



N/A 





Mean Cycles Between Failure 



>20 



N/A 



>20basedonMTBFof 

 42 hours 



Reliability of a Single Unit 



>90% 



N/A 



>90% at 90% 

 confidence level 



Preventative Maintenance Times 









Daily (excluding recharging power 

 source) 



1 hour 



N/A 



< 1 hour (limited to 

 wash-off and O-ring 

 lubrication) 



End of Project 



1.5 hours 



N/A 



< I hour (limited to 

 wash-off, O-ring 

 lubrication, and systems 

 check) 



Annual 



3 hours 



N/A 



<3 hours (recalibration 

 at Depot level) 



MTTR 



1 hour 



N/A 



< 1 hour (limited to 0- 

 ring replacement) 



Skill Level 



75% of all divers can 

 operate with 1 hour of 

 instruction on beach 



N/A 



4 out of 4 divers can 

 operate with 1 hour of 

 instruction on the beach 



27 



