I am in sumner co and i am hear a unit jumping calls call ALS 1 does someone now who or what it is. As i am typing this they are jumping another call in Gallatin.
I'm not in your area, but let me throw something into the mix.
This could be a supervisor unit or from the designator ALS 1 (Advanced Life Support) could be a paramedic that covers a large area and responds with BLS units. There is a county near me that if there is not a medic running on a squad the county paramedic responds in an SUV.