Zippy SESSA radios a different to CFS, they have 3 "bands" (can't think of a easier way to explain it). These bands are A,B,C (No Oscar
)accessed by a 3way toggle switch on top of the radio. Within those "bands" the are numerous channels for example Alpha17,Bravo 01, Charlie 30 (local simplex channel-good for traffic control). This gives state HQ, regions & units a primary a secondary & a simplex channel.
There are some "spares" that can be allocated to various tasks or situations, other government departments (not fire) have a similar system i.e we can talk to marine & harbours direct (if you know their "band" & channel).
I'm sure some of the "comms" people can explain it better, interestingly as mention previously over here we don't use grn much, are able to talk to the other eso's using the same radio & to talk to police get issued a police radio!
So hope that helps (I know your post could have been an attempt at humour as well
)
Thanks Piriejono - you typed quicker than I can
Heard you guys operate like that, same as central.
cheers