Actually, I noticed that if you send a Battalion chief to the scene and press Status 5, there's the menu that pops up. The first two options open up windows that contain all the different emergencies. I assume that if you click the type of emergency you have, it will send the correct trucks to the scene. Besides that, just send out as many trucks as you can fill. What I do is always send out a chief right away, followed by 11/44/1 (Engine) with 6 people. If there's still more, I'll send out the rescue (11/52/1 I think...) with the 2 or 3 guys that are usually left at the station. If you're wondering what units to staff with how many people, just think of the minimum... Chief: 1 Engine: MINIMUM 5, but you'll usually have enough guys for 6. Rescue: 2 or 3 depending on how many people you have left. Ladder: You can probably get away with 2, but 3 is the best. Tanker: 6+ Box Rescue Truck (the big red one): 2 Manpower Van: I think it holds up to 7 or so... So yeah, just use whatever you want but ALWAYS send 11/11/1 and 11/44/1 to every call (the chief and first engine).