A little more interop.. Had a major fire today in Hopewell and Fort Lee and Prince George responded mutual aid. Fort Lee automatically can just switch to Hopewell talkgroups but Prince George must also have Hopewell radios either installed in their units or have several portables because PG Engine 120, Truck 1, Air Utility 160, and Engine 510 all were on Hopewell Fire Dispatch from the start (the marked up responding on Hopewell Fire Dispatch). I knew Engine 510 had the capability but didn't know about all of the other units.