AV (AVAILABLE) - Unit is available for emergency Calls
DP (DISPATCHED) - Unit is has been dispatched to the emergency
ER (ENROUTE) - Unit is responding to the Emergency
AR (ARRIVED) - Unit has arrived at the Emergency
TR (TRANSPORTING) - Ambulance is taking a patient to the Hospital
TA (TRANSPORT ARRIVE) - Ambulance is at the Hospital
OS (OUT OF SERVICE) - Unit is Out of Service
MU (MOVE UP) - Unit was moved to reduce response time
ST (STATION MANNED) - Station is manned with Volunteer Firefighters