Basic Life Support (BLS) Ambulance – these vehicles are also referred to as “RAs” which is short for Rescue Ambulances. The numeric distinction between an ALS (Advanced Life Support) and BLS ambulance is easily established visually. All LAFD BLS Rescues are numbered in the “800” series. So, Rescue 827 is a BLS Ambulance, while Rescue 27 is an ALS Ambulance. If a Fire station is numbered above 100, a “9” is used instead. So the BLS Ambulance for Fire Station 106 is Rescue 906. All BLS Ambulances are staffed by firefighters who rotate through as part of their normal assignments. All LAFD members are EMT-D certified. EMT-D stands for Emergency Medical Technician – Defibrillator, meaning that LAFD fireighters are trained in pre-hospital medical assessment and care with the added skill of operating an automatic external defibrillator.