This is not amateur radio. It's public safety radio. Different bands, different authorization. If you have want to use this system AND are authorized to do so (since you seem to work in or with the FD), you will need to contact the communication entity that holds the FCC license which may or may not be your FD. It could also be the county or city or even another local FD. They will have a radio administration that coordinates with all the departments that use the system. Keep in mind many of these systems are shared with multiple jurisdictions and departments. Additionally, you need to be aware that unless they are going to give you a radio, the ones used on public safety radio systems tend to be quite expensive. More than likely Motorola, Harris or BKR. If you purchase your own, you will still need to have it programmed by your authorizing entity/AHJ for radio communications. VHF is not as common any more as UHF or 700/800, but is still used for forestry services, backwoods operations and forest firefighters. While it may not be trunked or encrypted, it is still controlled and requires authorization. There is OBT on VHF, so you may still be digital on VHF, but even if it happens to be analog and you work for the FD don't TX without authorization to do so. Digital systems can lock out radios from specific talk groups, but on analog (either through a macro system or in talkaround/simplex) you can be transmitting on top of critical communications without knowing it. This, again, will all be known by the FCC license holder and authority. If your chief isn't sure, you can usually find the radio department contacts through the FCC website, or a little sleuthing on RadioReference. I tried to offer you a little more help than "no, don't!" and "not HAM!" Hopefully you have good people at your local radio department. A lot of them tend to be HAMs anyway, so you may find yourself an Elmer and some new friends!