Ok - to set that particular phrase straight:
In a nutshell - the firefighters say that so that the dispatcher can place the unit in the correct status for future call recommendations. It tells the computer that the aid car/engine/whatever is now back in it's first response area, and can now respond per the "response plan" for that area.
Eastside Communications (the agency that dispatches Eastside Fire and Rescue, along with just about all the Fire Dept's over here) uses a complicated Computer Aided Dispatch program that was created by a company called "TriTech". This CAD system does not use "runcards" - it uses "Response Plans".
When generating a response to an incident, this CAD system does not necessarily look for the closest fire station. It looks for a resource that has the quickest response time to the scene based on it's computations of road travel distance.
Part of this computation will be the actual location of an apparatus at that moment. This was planned for use with Automatic Vehicle Location systems - but, that part of the system is not on line yet.
Right now (without the AVL system), when a fire unit goes "in service", the CAD system remembers it's last location - be it a fire scene, collision scene, or hospital. The CAD system will use that previous location for computing future responses - unless that fire unit tells the dispatcher that the are "not in their local area". In most cases, this isn't a problem, because most fire units are responding within their first-response area, and when they go in service they are usually either within or very close to their "local area".
The problem comes up when they are not near their "local area". For now, they may wait to put themselves back in service until they are back in their "local area". Or, They may put themselves in service "with a 10 minute delay" (to give them some time to get back to their area). That simply tells the dispatcher to tell CAD to add 10 minutes to that unit's normal response time. In that way, CAD may overlook the normal "first in" unit in favor of a unit that can respond quicker than the 10 minute delay specified.
When AVL is activated later this year, the computer will actually determine a call response based on the current location of an apparatus. So, if Bellevue Engine 8 (which is normally stationed in the Cougar Mountain area) just happens to be up near the Bellevue Training Center for whatever reason, and a fire response comes in nearby, then Engine 8 will be the recommended unit - because they are physically the closest apparatus to the incident (not the normal first in station).
Hopefully, that made some sense - it does get more complicated than that....
Brad
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