Thanks Kathy - The 45th and the 498th were Medical Companies (Air Ambulance). I was in the 498th at Lane Army Heliport near Qui Nhon. The 45th was down south. The Med Co. each had 25 hueys that were assigned 6 to a platoon with one for the old man. The detachments consisted of six hueys with a Commanding Officer of their own.
The 54th, of which Patrick Brady lead, was one of the best regarded dustoff units in country. They set a very high bar for others.