Some departments can only budget for 1 HT for each rig, and the A in that case always designates the HT. Back in my VFF/EMT/FR days, we had that system, since we could only afford to outfit the units with a single HT. We had to purchase our own HT's for individual usage, and used our badge #'s as designations for both our mobiles in our vehicles, and our HT's. EX: My BN was 31, and since we did a lot of interop with PD, PD used the town initials, and we used FD... When letting FD, or EOC know I am en route etc, you'd hear "FD31, FD. 31 is 10-17 Code 3 to scene, advise when Engine 3 is 10-17." Then once 3 was on scene and we were knocking a fire out, and say, I was on hose and they turned on the water for my line, you'd hear "Engine 3 A, 31. Pressure in the line!" Though now with the growth of the budget, and overall FD back there, they run according to more standard tactical guidelines.
Admin & Mod for AR, LA, MS, and TN
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