Una Due tfc
When was the last time LHR had 2 fires at the same time? I also wonder how long it takes to turn around the airport fire vehicles after they have discharged their foam and get them ready to roll again
The
bold, italic is one of the very concerns a Pre-Accident Plan takes into account. An empty foam unit is of very little value to fire fighting efforts.
If every vehicle is committed (or enough of them that the remaining would be insufficient to handle another response), you close operations until you can restore the appropriate level of operational equipment available for immediate response.