Firegrounds are like Operations# channels, here it is called OPS# (Indy Fire), and for the townships outside the Indy Fire area they are also called OPS# as well. Some smaller departments use the phrase Fireground. When a fire is dispatched, it is assigned to a FG or OPS channel depending on where on the county map the fire is. Ex: Nw Side is OPS1, Ne Side is OPS2, so on and so forth, but not in that specific order. I have probably said things other members have alread said but I hope this helps.