Jeffrey, The best thing I would say is to put it in and see if you hear anything. I have a friend who is a dispatcher and, based on what he told me about activity on all of the frequencies in the RR database, I only have the VHF frequencies programmed. Apparently MANY if the licensed frequencies are really not used.
I know that the Police channels 2 and 3 are really never used. Dispatch, traffic stops, driver's license information, registration information, etc. is all done on channel 1.
I asked him if he knew what the "operations" channel listed is for and his answer was "no clue". Not sure if he was holding back on me or not. I hear traffic from time to time, but it is normally static-filled and I only hear it when I am out and about in the area of 11&15 near Perdix, Duncannon, etc. We have really not had a major nearby incident since I have been seriously back in the hobby, so I don't know about activity on fire 2 and 3 channels.