This online glossary provides a comprehensive list of all major aviation abbreviations.
HAA |
height above the airport |
HAT |
height above the touchdone zone |
HC |
harness connector |
HCU |
hydraulic control unit |
HDG |
heading |
HIRF |
high intensity radiated field |
HLCS |
high lift control system |
HF |
high frequency |
HMU |
hydrau-mechanical unit |
HMS |
heat management system |
HP |
high pressure |
hPa |
hectopascals |
HPA |
high power amplifier |
HPC |
high pressure compressor |
HPSOV |
high pressure shut-off valve |
HPT |
high pressure turbine |
HPV |
high pressure valve |
HSI |
horizontal situation indicator |
HUD |
head up display |
HYD |
hydraulic |
HYDIM |
hydraulic interface module |
HX |
heat exchanger |
Hz |
hertz |
IAF |
initial approach fix |
IAS |
indicated airspeed |
IATA |
International Air Transport Association |
IC |
intercabinet |
ICAO |
International Civil Aviation Organization |
IDG |
intergrated drive generator |
IDS |
ice detection system |
IFR |
instrument flight rules |
IGN |
ignition |
IGV |
inlet guide valve |
IGW |
increased gross weight |
ILS |
instrument landing system |
INB |
inbound |
ind |
indicator |
INOP |
inoperative |
INPH |
interphone |
I/O |
inputs/outputs |
IOM |
input/output module |
IP |
intermediate pressure |
IPC |
intermediate pressure compressor |
IPC |
intermediate pressure check valve |
IPT |
integrated project team |
IPT |
intermediate pressure turbine |
IRP |
integrated refuel panel |
IRS |
inertial reference system |
IRU |
inertial reference unit |
ISA |
International Standard Atmosphere |
ISDU |
initial system display unit |
ISLN |
isolation |
ISO |
isolation |
IV |
isolation valve |
IVD |
interactive video downloader |
KB |
keyboard |
kg |
kilogram |
km |
kilometer |
kt |
knot |
kVA |
kilovolt-ampere |