1AF First Air Force ETTC Eastern Technical Training Command NPG Naval Proving Grounds
2AF Second Air Force Fld Field NW North West
3AF Third Air Force FS Flight Strip OLF Out Lying Field
4AF Fourth Air Force ID Identification PDC Personnel Distribution Command
A/N Army / Navy LF Landing Field RAC Regional Aeronautical Chart
AAB Army Air Base LTA Lighter-Than-Air RR Rail Road
AAF Army Air Field MCAAF Marine Corps Auxiliary Air Facility S South
ADC Airport Directory Company - commercial published directory of airports in USA MCAF Marine Corps Air Facility SAC Sectional Aeronautical Chart
AFS Army Flying School MCAS Marine Corps Air Station SB Sub Base
ATC Air Transport Command MCGB Marine Corps Glider Base SE South East
ATS Army Technical School N North SSE South South East
ATSC Air Technical Service Command N/S North / South SSW South South West
Aux Fld Auxiliary Field NAAF Naval Auxiliary Air Facility SW South West
CAA Civil Aeronautics Commission (part of the Department of Commerce) NAAS Naval Auxiliary Air Station TBD To-Be-Determined
CAF Continental Air Forces NAF Naval Air Facility TC Training Command
CCTS Combat Crew Training Station NAFC Naval Air Ferry Command TCC Troop Carrier Command
CFTC Central Flying Training Command NANS Naval Aerial Navigational School U.S. United States
CG Commanding General NAOTC Naval Air Operational Training Command U.S.A. United States of America
CGAS Coast Guard Air Station NAS Naval Air Station USGS United States Forest Service
CO Company NAT Naval Air Transport W West
CPS Contractor Pilot School NATS Naval Air Transport Service WAC World Aeronautical Chart
DOC Department of Commerce NE North East WFTC Western Flying Training Command
E East NNE North North East WSW West South West
EFTC Eastern Flying Training Command NNW North North West WTTC Western Technical Training Command
ESE East South East NPG Naval Proving Grounds