| APS AERO CHART |
| HAT |  Height Above Touchdown
|
| haz | hazard
|
| HDF | High Frequency Direction Finder
|
| hdg | heading
|
| HDTA | High Density Traffice Airport/Aerodrome
|
| HF | High Frequency (3000 to 30,000kHz)
|
| Hg | mercury (liquid element)
|
| hgr | hangar
|
| hgt | height
|
| hi | high
|
| Hi | ALT or HA High Altitude
|
| HI | Hawaii (50th USA Pacific Islands state)
|
| HIFOR | High Level Forecast
|
| HILS | Heliport Instrument Lighting System
|
| HIRL | High Intensity Runway Lights
|
| HIRTA | High intensity radio transmission area
|
| HIWAS | Hazardous Inflight Weather Advisory Service
|
| HK | Hong Kong (formerly UK territory on S China Sea, now special trade district of China)
|
| hldg | holding
|
| HO | Honduras (Central America nation on Caribbean and Pacific Ocean)
|
| HO | Service Available to meet Operational Requirements
|
| hol | holiday
|
| HOLF | Helicopter Outlying Field
|
| horiz | horizontal
|
| hosp | hospital
|
| hPa | hectopascal
|
| HPOX | High Pressure Oxygen
|
| HPZ | Helicopter Protected Zone
|
| HQ | Headquarters
|
| hr | hour
|
| HR | Croatia
|
| HS | service available during hours of scheduled operations
|
| hsg | housing
|
| HTA | Helicopter Training Area
|
| HU | Hungary (nation near center of eastern Europe)
|
| HVDF | High and Verh High Frequency Direction Finder (at the same location)
|
| hvy | heavy
|
| HW | Heavy Weight
|
| hwy | highway
|
| HX | Station having no specific working hours
|
| Hz | Hertz (cycles per second - radio/electromagnetic waves)
|
| EUROCONTROL |
| H | Hungary
|
| H, h | Hour
|
| H/M/L | High/Medium/Low (ATC Complexity)
|
| HA | Holding to an Altitude (ARINC 424 Path Terminator)
|
| HAD | Human Aspects Development
|
| HADAMARD | Multi-radar processing written in ADA
|
| HALO | High Altitude, Low Opening
|
| HALS / DTOP | High Approach Landing System / Displaced Threshold Operations
|
| HAMMER | High-level All-purpose Monitoring and Management Equipment for RADNET
|
aero glossary
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