Glossary

Look up acronyms, technical terms and phrases to find out what they mean.

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HPA

Definition
HectoPascal
Glossary Measurement

HR

Definition
Hours
Glossary Measurement Source: AIS

HS

Definition
Service available during hours of scheduled operations
Glossary Communication Source: AIS

HSL

Definition
Hold Short Lights
Glossary Aerodrome Navigation Source: AIS

HUD

Definition
Head Up Display
Glossary Systems Source: AIS

HURCN

Definition
Hurricane
Glossary Meteorology

HVDF

Definition
High and very high frequency direction finding stations (at the same location)
Glossary Communication Source: AIS

HVY

Definition
Heavy (used to indicate the intensity of WX phenomena, eg HVY RA = heavy rain)
Glossary Meteorology Source: AIS

HX

Definition
No specific working hours (NOTAM or ERSA)
Glossary Communication Source: AIS

HYR

Definition
Higher
Glossary Measurement Source: AIS
Online version available at: https://www.casa.gov.au//resources-and-education/glossary
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