# Korean Air Flight 801 - Aircraft Accident Report (NTSB)/Abbreviations

​Abbreviations
| AC | advisory circular |
| ADF | automatic direction finder |
| ADI | attitude director indicator |
| AFB | Air Force Base |
| agl | above ground level |
| AIG | Accident Investigation Group |
| ALA | approach and landing accident |
| ALPA | Air Line Pilots Association |
| ARFF | aircraft rescue and firefighting |
| ARTS | Automated Radar Terminal System |
| ASR | Airport Surveillance Radar |
| ATC | air traffic control |
| ATCT | air traffic control tower |
| ATIS | automatic terminal information service |
| ATP | airline transport pilot |
| CAA | civil aviation authority |
| CAMI | Civil Aeromedical Institute |
| CDI | course deviation indicator |
| CERAP | Combined Center/Radar Approach |
| CFIT | Control controlled flight into terrain |
| CFR | Code of Federal Regulations |
| CRM | crew resource management |
| CVR | cockpit voice recorder |
| D-BRITE | digital bright radar indicator tower equipment |
| DFDR | digital flight data recorder |
| DH | decision height |
| DME | distance measuring equipment |
| DOD | Department of Defense |
| DOT | Department of Transportation |
| DOT/IG | Department of Transportation Office of Inspector General |
| EARTS | En route Automated Radar Tracking System |
| EMT | emergency management technician |
| EU | European Union |
| FAA | Federal Aviation Administration |
| FAF | final approach fix |
| FAR | Federal Aviation Regulation |
| FD | flight director |
| FDAU | flight data acquisition unit |
| FDR | flight data recorder |
| F/E | flight engineer |
| FMA | flight mode annunciator ​ |
| FMS | flight management system |
| FSF | Flight Safety Foundation |
| GCD | Guam Civil Defense |
| GFD | Guam Fire Department |
| GPS | global positioning system |
| GPWS | ground proximity warning system |
| GS | glideslope |
| HAT | height above touchdown |
| Hg | Mercury |
| HSI | horizontal situation indicator |
| Hz | Hertz |
| IAF | initial approach fix |
| IASA | International Aviation Safety Assessment |
| ICAO | International Civil Aviation Organization |
| IFR | instrument flight rules |
| ILS | instrument landing system |
| IMC | instrument meteorological conditions |
| IOE | initial operational experience |
| KCAB | Korean Civil Aviation Bureau |
| kg | kilogram |
| LOC | localizer |
| LOFT | line-oriented flight training |
| MAP | missed approach point |
| MDA | minimum descent altitude |
| MHz | megahertz |
| MOCT | Ministry of Construction and Transport |
| MOU | memorandum of understanding |
| MSAW | minimum safe altitude warning |
| msl | mean sea level |
| NASA | National Aeronautics and Space Administration |
| NDB | nondirectional beacon |
| nm | nautical mile |
| NOTAM | Notice to Airmen |
| NPRM | notice of proposed rulemaking |
| NWS | National Weather Service |
| OSC | on-scene commander |
| OST | Office of the Secretary of Transportation |
| PAPI | precision approach path indicator |
| PF | pilot flying |
| PIC | pilot-in-command |
| PNF | pilot not flying |
| POI | principal operations inspector ​ |
| SIGMET | Significant Meteorological Information |
| SOF | supervisor of flying |
| SOP | standard operating procedure |
| STAR | standard terminal arrivals |
| STARS | Standard Terminal Automation Replacement System |
| TACAN | tactical air control and navigation |
| TAESA | Transportes Aereos Ejecutivos, S.A. |
| TAF | terminal aerodrome forecast |
| TAWS | terrain awareness and warning system |
| TCAS | traffic alert and collision avoidance system |
| TERPS | Terminal Instrument Procedures |
| TOD | top of descent |
| TRACON | terminal radar approach control |
| TSA | time since awakening |
| TSO | technical standard order |
| UTC | coordinated universal time |
| VASI | visual approach slope indicator |
| VFR | visual flight rules |
| VHF | very high frequency |
| VMC | visual meteorological conditions |
| VNAV | vertical navigation |
| VOR | very high frequency omnidirectional radio range |
| WSR-88D | Weather Surveillance Radar-1988, Doppler |