Acronyms

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H

Acronym	Meaning	Source
H24	Continuous day and night service	AIS
HAA	Height Above Aerodrome	AIS
HAA	Helicopter Association of Australia
HAAMC	Head of Aircraft Airworthiness and Maintenance Control	Aviation Law in Australia, 2004 edition
HAM	Head of Aircraft Maintenance	CASR Part 145
HAMC	Head of Aircraft Maintenance Control	CASR Part 145
HAPI	Helicopter approach path indicator	ICAO
HAT	Height Above Threshold	AIS
HBN	Hazard Beacon	AIS
HDF	High frequency direction-finding station	ICAO
HDG	Heading	AIS
HDS	Hours of Daylight Saving	AIS
HEL	Helicopter	AIS
HF	High Frequency (3000 to 30,000 KHZ)	AIS
HFEM	Human Factor and Error Management System
HGFA	Hang Gliding Federation of Australia Inc
HGS	Heads-up Guidance System
HGT	Height, Height Above	AIS
HIAL	High Intensity Approach Lighting	AIS
HIOL	High Intensity Obstacle Lights	AIS
HIRL	High Intensity Runway Lighting	AIS
HJ	Sunrise to Sunset	AIS
HLDG	Holding	AIS
HLS	Helicopter Landing Site	AIS
HMI	Human-machine Interface
HN	Sunset to Sunrise	AIS
HO	Service available to meet operational requirements	AIS
HOFO	Head of Flying Operations
HOL	Holiday
HOSP	Hospital Aircraft	AIS
HOTAS	Head of Training and Standards
HOTC	Head of Training and Checking
HP	Horse Power
HPA	HectoPascal	AIS
HR	Hours	AIS
HS	Homestead	AIS
HS	Service available during hours of scheduled operations	AIS
HSL	Hold Short Lights	AIS
HUD	Heads Up Display
HURCN	Hurricane	AIS
HVDF	High and very high frequency direction finding stations (at the same location)	AIS
HVY	Heavy	AIS
HVY	Heavy (used to indicate the intensity of WX phenomena, eg HVY RA = heavy rain)	AIS
HX	No specific working hours	AIS
HYR	Higher	AIS
HZ	Haze	AIS
HZ (hz)	Hertz	AIS
HZS	Horizontal Surface	AIS