Quote:to further complicate things, ocfa is now in a test program with engines 13 , 35 an 47 which are pau's  to  acess , treat  and transport a patient with the pau unit thus returning the als unit to service, if it is deemed by the pau unit that  a full als unit is not needed. most cities in orange county have been doing this for years, the calls are prioritized into alpha, bravo, Charlie, delta and echo responses. alpha and bravo are bls calls with a bls engine and ambo sent. Charlie, delta and echo are als calls with a bls or pau  engine and als engine sent along with an ambo