I have been doing some research on the St Clair Co fire dispatch channels through StarCom, especially with CENCOM east and CENCOM west. I am only talking about these two dispatch centers for now. I understand and have the two dispatch TG channels for each. I also have the two 'responding' channels for each. I understand that the east agencies switch to the older VHF command channels (color coded) for on scene ops. But the west agencies switch to "Fire Comm 1 thru 4" for on scene ops. I am having trouble finding those channels (and assuming they are TG's) after some searching. Can anyone enlighten me to those TG's? Really curious about them. I have also heard talk about something like 'on scene ops channels' too. Any idea? Thanks to all.