H
Heavy
HDG
Heading
HDG
Heading
HDG SEL
Heading Select
HDOP
Horizontal Dilution Of Precision
HF
High Frequency
HF
High Frequency
HHLD
Heading Hold
HL
Height Loss
HMD
Helmet Mounted Display
HPA
Human Powered Aircraft
HSD
High Speed Data
HSI
Horizontal Situation Indicator
HSI
Horizontal Situation Indicator
HSL
Heading Select
HUD
Head-up display
HUD
Head-Up Display