[FlyMoreRockets]

Exactly this. I spent decades as a FF/EMT and that's the way it was typically done.

I did however, often carry a Baofeng programmed with _all_ the services with which I was likely to interact as a backup: MedEvac, EMS, law enforcement and fire services. Yes, I am a licensed ham operator.

The problem is there is no national emergency interop frequency plan, each state, county and city does things differently.

[NovemberWhiskey]

DHS publishes the National Interoperability Field Operations Guide which includes a national channel plan for calling, simplex and deployable repeater operation.

Each state/county/etc. may have different licensing, but they are also encouraged to program the NIFOG channel plans when space is available on radios.