The 7th Contracting Squadron (7 CONS) at Dyess Air Force Base (AFB) requires a Mobile Breathing Air Recharging System. The System will be used to resupply breathing air bottles for firefighters during... The 7th Contracting Squadron (7 CONS) at Dyess Air Force Base (AFB) requires a Mobile Breathing Air Recharging System. The System will be used to resupply breathing air bottles for firefighters during complex emergencies. Below are the specifications. The air compressor must meet the minimum salient characteristics listed in the attachment below.