Glossary

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

Showing 1 - 15 of 44 results

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O/R

Definition
On Request
Glossary Communication

OAR

Definition
Office of Airspace Regulation
Glossary Organisation

OAT

Definition
Outside Air Temperature
Glossary Meteorology Source: CASA

OBPR

Definition
Office of Best Practice Regulation
Glossary Organisation

OBS

Definition
Observe, Observed, Observation
Glossary Meteorology

OBS

Definition
Omni Bearing Selector
Glossary Navigation

OBSC

Definition
Obscure, Obscured, Obscuring
Glossary Safety

OBST

Definition
Obstacle
Glossary Safety

OBSTR

Definition
Obstruction
Glossary Safety

OC

Definition
Operating Certificate
Glossary Certification

OCA

Definition
Oceanic Control Area
Glossary Meteorology Air traffic control

OCA

Definition
Obstacle Clearing Altitude
Glossary Flight planning

OCC

Definition
Occulting (light)
Glossary Meteorology

OCH

Definition
Obstacle Clearance Height
Glossary Measurement

OCNL

Definition
Occasional, Occasionally
Glossary Meteorology
Online version available at: https://www.casa.gov.au//resources-and-education/glossary
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