If this is a call in the game feel free to say so. Now i was thinking for a new joint ems-fire-police call maybe a Full arrest ? that would require a fly car, 1 pd unit , ambulance, and a Type 1 engine OR Heavy rescue/utility unit to respond. I dont know about all of you guys but in the departments around here, where i live. Fire depts are activated with Ems and Police to respond to all Priority 1/ Echo calls( Higher Priority calls) to assist the ambulance
A second idea call also ems that i had in my mind was a status check .. that could need a Type 1 engine ( forcible entry), 1 police unit and one ambulance