What exactly is AIRS IN & AIRS OUT?
The reports for attending a call IN your primary response area, or OUT of your primary response area. What used to be called Primary and Support.
Response area for what? This is not defined... Fire/Rescue/Hazmat areas are all so vastly different, and could all be counted as a Brigades "Primary" Response area.
If you actually bother to read the reference guide it does specify that "IN" is for jobs in your primary 'fire' area and "OUT" is for jobs in other brigades primary fire area. It does also state that IN/OUT is based on fire response area only, not RCR or HAZMAT responsibilities.
RCR/HAZMAT areas of responsibility have never been considered a brigades primary area in terms of reporting, so lets not stir the pot unnecessarily.