A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

HHigh pressure area or the centre of hight pressure
H24Continuous day and night service
HAPIHelicopter approach path indicator
HBNHazard beacon
HDFHigh frequency direction−finding station
HDGHeading
HELHelicopter
HEMSHelicopter Emergency Medical Service
HFHigh frequency (3 000 to 30 000 kHz)
HGTHeight or height above ...
HJSunrise to sunset
HLDGHolding
HNSunset to sunrise
HOService available to meet operational requirements
HOLHoliday
HOSPHospital aircraft
HPAHectopascal
HRHours
HSService available during hours of scheduled operations
HURCNHurricane
HVDFHigh and very high frequency direction−finding stations (at the same location)
HVYHeavy
HVYHeavy (used to indicate the intensity of weather phenomena, e.g. HVY RA = heavy rain)
HXNo specific working hours
HZHaze
HZHertz (cycle per second)
(C) 2012-18 Jan Hrkal