Glossary

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

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UNREL

Definition
Unreliable
Glossary Communication Source: AIS

UOC

Definition
Unmanned operating certificate
Glossary Certification

US FAR

Definition
Federal Aviation Regulations (of the USA)
Glossary Regulations Source: AIS

UTA

Definition
Upper Control Area
Glossary Air traffic control

UTC

Definition
Coordinated Universal Time
Glossary Measurement

UTM

Definition
Uncrewed Aircraft Systems Traffic Management
Glossary

V

Definition
Velocity
Glossary Measurement Source: AIS

V1

Definition
Take-off Decision Speed
Glossary Flight operations Source: AIS

V2

Definition
Take-off Safety Speed (Applicable to Larger Multi-engine Aircraft)
Glossary Safety

VA

Definition
Maximum Manoeuvring Speed
Glossary Flight operations
Online version available at: https://www.casa.gov.au//resources-and-education/glossary
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