Civil aviation dictionary
Aviation glossary
Terms, abbreviations and procedures explained without unnecessary jargon, with English names and clear definitions.
- Total entries
- 2480
- Terms
- 435
- Abbreviations
- 2045
H
- Abbreviationhazard
HAZ stands for hazard in FAA terminology.
- Abbreviationhazard beacon
HBN stands for hazard beacon in FAA terminology.
- Abbreviationhazardous area reporting service
HARS stands for hazardous area reporting service in FAA terminology.
- AbbreviationHazardous In-Flight Weather Advisory
HWAS stands for Hazardous In-Flight Weather Advisory in FAA terminology.
- Abbreviationhazardous inflight weather advisory service
HIWAS stands for hazardous inflight weather advisory service in FAA terminology.
- Abbreviationhazardous material
HAZMAT stands for hazardous material in FAA terminology.
- SafetyHAZARDOUS MATERIALS (HAZMAT)
Hazardous materials as defined by 49 Code of Federal Regulations (CFR) §171.8. (Refer to 49 CFR part 171.8) (Refer to AIM)
- SafetyHAZARDOUS WEATHER INFORMATION
Summary of significant meteorological information (SIGMET/WS), convective significant meteorological information (convective SIGMET/WST), urgent pilot weather reports (urgent PIREP/UUA), center weather advisories (CWA), airmen's meteorological information (AIRMET/WA), graphical airmen's meteorological information (G-AIRMET) and any other weather such as isolated thunderstorms that are rapidly developing and increasing in intensity, or low ceilings and visibilities that are becoming widespread which is considered significant and are not included in a current hazardous weather advisory.
- AbbreviationHazardously Misleading Information
HMI stands for Hazardously Misleading Information in FAA terminology.
- AbbreviationHead-Up Display
A display presenting information within the pilot's forward field of view.
- NavigationHeading
The direction in which the aircraft's longitudinal axis points, measured from a chosen north reference.
- MeteorologyHeadwind
The component of wind blowing against the aircraft's direction of travel.
- AbbreviationHeating, Ventilating, and Air Conditioning
HVAC stands for Heating, Ventilating, and Air Conditioning in FAA terminology.
- AirportsHEIGHT ABOVE AIRPORT (HAA)
The height of the Minimum Descent Altitude above the published airport elevation.
- OperationsHEIGHT ABOVE TOUCHDOWN (HAT)
The height of the Decision Height or Minimum Descent Altitude above the highest runway elevation in the touchdown zone (first 3,000 feet of the runway).
- AbbreviationHelicopter Emergency Medical Service
HEMS stands for Helicopter Emergency Medical Service in FAA terminology.
- Abbreviationhelicopter operations
HOP stands for helicopter operations in FAA terminology.
- AbbreviationHELIPORT REFERENCE POINT (HRP)
The geographic center of a heliport.
- OperationsHERTZ
The standard radio equivalent of frequency in cycles per second of an electromagnetic wave.
- Abbreviationhigh altitude balloon
HIBAL stands for high altitude balloon in FAA terminology.
- AbbreviationHigh Altitude EFAS
HI-EFAS stands for High Altitude EFAS in FAA terminology.
- AbbreviationHigh Altitude Route System
HARS stands for High Altitude Route System in FAA terminology.
- Abbreviationhigh and very high frequency direction finding stations
HVDF stands for high and very high frequency direction finding stations in FAA terminology.
- Abbreviationhigh clouds visible
HCVIS stands for high clouds visible in FAA terminology.