So in other words: radios/fleet maps are set up on a case-by-case (or field office/protective detail) basis. It makes sense for UD or a Field Office to have channels from the local agencies (given that there’s a set number of agencies in their area) but what about a protective detail that travels across the world? Surely they don’t reprogram the radios each time they travel? I also don’t see any reason why It’d be advantageous for a protective detail to be able to communicate with another entity when they always have representatives from those agencies with them?
YMMV - but yes, in my experience each Region or Field Office has their own set of Zones and Channels to be put into a Code Plug.
an Example - altho under the same Parent of DHS, the agencies of Customs, ICE and Border Patrol have very unique channel plans.
They do share some infrastructure as well as have common channels, but each have their own network(s)
Now within ICE we have DRO/ERO , ICE and HSI
each have their own networks, some just simplex within the Jail, the other two do share come common overlap of channels
and then each do also have the basic Customs channel plans, and they all have both the NIFOG interops, DOJ 25 City Interops as well as might (again YMMV) access to the local, county, state, regional Networks (both trunked and conventional) - and the final note is they would generally also have access to the adjoining Field Office (again YMMV) for those cross border OPS.
But there is NO ONE STOP Nationwide Code Plug as you would run out of room
As to Protective Details - most are likely simplex and unless we are near-by, rarely heard from
We now return us to the SEARCH mode for finding new systems