Aeronautical Terms beginning with H
HAA
Height Above Airport
HAT
Height Above Touchdown
HAZMAT
Hazardous Materials
HEMS
Helicopter Emergency Medical Service
HF
High Frequency
HFDL
High Frequency Data Link
HITS
Highway In The Sky
HSAC
Helicopter Safety Advisory Council
HSI
Horizontal Situation Indicator
HUD
Head-Up Display
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