Luft Bier
Airman
As with everything it seems, the Army and Navy do things differently. Prior to WWII, the USAAC had a system where tech documents started with Technical Order 01... For aircraft, while the Navy was NavAer for Bureau of Aeronautics. Sometime between June and September of 1943 everything went to the AN standard which I'm guessing is Army Navy? From there the Navy went to NAVWEPS until 1966 when it became the current NAVAIR. I cannot find much info on the AN stanfard nor what the USAAC used prior to WWII. Does anyone have any info regarding this?