AIRFLEX
Bill...years ago the BCFD had 5 specialized units; (2) Floodlight trucks / (2) Hi Expansion Foam trucks & 1 Air Cascade truck. Sometime in the mid 70's, if I remember correctly, they did away with these units and combined them into 1 AIR (for filling bottles), FL (for lighting) EX (for hi expansion foam... thus the term AIRFLEX. There are 2; one for fires east of Charles St. & one for fires west of Charles St. I hope this helps.