|
Definition |
Contraction |
Usage |
|
hail
(greater than 3/4”) |
GR
|
METAR
|
|
hail
showers |
SHGR
|
METAR
|
|
hail
showers (small) |
SHGS
|
METAR
|
|
hailstones |
HLSTO
|
NWS
|
|
half
|
HLF
|
GEN
|
|
handoff point |
HOP
|
ATC
|
|
handover word |
HOW
|
ATC
|
|
hangar |
HNGR
|
GEN
|
|
hard
freeze |
HDFRZ
|
NWS
|
|
Hawaiian Air Defense Division
|
HADD
|
GEN
|
|
Hawaiian Air Defense Identification Zone
|
HADIZ
|
GEN
|
|
Hawaiian Air National Guard
|
HANG
|
GEN
|
|
Hawaiian Defense Area
|
HADA
|
GEN
|
|
hazard |
HAZ
|
GEN
|
|
hazard beacon |
HBN
|
ICAO
|
|
hazardous area reporting service
|
HARS
|
ATC
|
|
hazardous inflight weather advisory
service |
HIWAS
|
GEN
|
|
hazardous material |
HAZMAT |
ICAO
|
|
haze
|
HZ
|
METAR
|
|
Head
of State status |
HEAD
|
ICAO
|
|
heading |
HDG
|
ICAO
|
|
headquarters |
HQ
|
GEN
|
|
headwind |
HDWND
|
ATC
|
|
heater |
HTR
|
GEN
|
|
heavy
|
HVY
|
GEN
|
|
heavy
(to qualify weather phenomena, e.g. XXRA
heavy rain) |
XX
|
ICAO
|
|
hectopascal |
HPA
|
ICAO
|
|
height |
HGT
|
GEN
|
|
height above airport |
HAA
|
GEN
|
|
height above landing |
HAL
|
GEN
|
|
height above touchdown
|
HAT
|
GEN
|
|
helicopter |
HEL
|
ICAO
|
|
helicopter operations
|
HOP
|
GEN
|
|
heliport |
HELI
|
GEN
|
|
here
|
ER
|
ICAO
|
|
here
|
HR
|
GEN
|
|
hertz
|
Hz
|
GEN
|
|
heterodyne |
HTN
|
GEN
|
|
high
|
HI
|
NWS
|
|
high
altitude balloon |
HIBAL
|
GEN
|
|
high
and very high frequency direction
finding stations |
HVDF
|
ICAO
|
|
high
clouds visible |
HCVIS
|
NWS
|
|
high
density traffic airport
|
HDTA
|
GEN
|
|
high
density traffic zones
|
HDATZ
|
ATC
|
|
high
frequency |
HF
|
GEN
|
|
high
frequency direction finding station
|
HDF
|
ICAO
|
|
high
index |
HX
|
NWS
|
|
high
intensity approach light system
|
HIALS
|
GEN
|
|
high
intensity runway lights
|
HIRL
|
GEN
|
|
high
level forecast |
HIFOR
|
NWS
|
|
high
voltage |
HV
|
GEN
|
|
higher |
HYR
|
ICAO
|
|
highest temperature |
HITMP
|
NWS
|
|
highest temperature equaled for all time
|
HIEAT
|
NWS
|
|
highest temperature equaled for the
month |
HIEFM
|
NWS
|
|
highest temperature equaled so early
|
HIESE
|
NWS
|
|
highest temperature equaled so late
|
HIESL
|
NWS
|
|
highest temperature exceeded for all
time |
HIXAT
|
NWS
|
|
highest temperature exceeded for the
month |
HIXFM
|
NWS
|
|
highest temperature exceeded so early
|
HIXSE
|
NWS
|
|
highest temperature exceeded so late
|
HIXSL
|
NWS
|
|
highway |
HWY
|
GEN
|
|
hilltop |
HLTP
|
NWS
|
|
hold
for release |
HFR
|
ATC
|
|
holding |
HLDG
|
ICAO
|
|
holding as previously instructed
|
HAPI
|
ATC
|
|
holding pattern |
HP
|
GEN
|
|
holiday |
HOL
|
GEN
|
|
homing beacon |
HB
|
ATC
|
|
horizon |
HRZN
|
GEN
|
|
Horizontal Dilution of Precision
|
HDOP
|
ATC
|
|
hospital aircraft |
HOSP
|
ICAO
|
|
hour
|
HR
|
ICAO
|
|
household effects |
HHE
|
GEN
|
|
how
will arrival report be filed concerning
|
HIRIV
|
ATC
|
|
however |
HWVR
|
GEN
|
|
Hudson Valley |
HDSVLY |
NWS
|
|
humanitarian mission |
HUM
|
ICAO
|
|
hundred |
HND
|
GEN
|
|
hurricane |
HURCN
|
NWS
|
|
hurricane report |
HUREP
|
NWS
|
|
hydraulic |
HYD
|
GEN
|
|
hydrographic |
HYDRO
|
GEN
|
