Table 7. Description of Mocks-ups 



Mock-Up Type 



Chest 



Wing tanks 



Backpack 



Description 



3 in. thick x 12 in. wide x 

 14 in. long; worn under 

 breathing bag 



2 in. x 3-1/2 in. x 25 in., 

 plus 2 in. x 3-1/2 in. x 10 

 in; attaches to outer sides 

 of gas tanks 



4-1/8 in. x 6-1/4 in. x 24 

 in.; attaches to back of 

 breathing gas tanks 



Predicted 

 Capacities 



8 kW-hr 



2 kW for 4 hr 



4 kW-hr 



1 kW for 4 hr 



8 kW-hr 



2 kW for 4 hr 



Note: 1 in. 



2.54 cm. 



Table 8. Mock-up Performance Tests in Swimming Pool 



Diver Gear 



Speed (mph) for — 



Mean 



Speed Loss 



(mph) 



Diver A 



Diver B 



Mark 6 UBA 



Mark 6 UBA plus 

 chest heater 

 unit 



Mark 6 UBA plus 

 wing tank heater 

 unit 



1.12 

 1.08 



1.06 



1.48 

 1.51 



1.37 



0.015 

 0.075 



Note: 1 mph =1.6 km/hr. 



71 



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