Glossary

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

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OM

Definition
Operations Manual
Glossary Manuals and handbooks

OPA

Definition
Opaque, white type of ice formation
Glossary Meteorology

OPC

Definition
Office of Parliamentary Counsel
Glossary Organisation

OPMET

Definition
Operational Meteorological
Glossary Meteorology

OPN

Definition
Operational Notification Message (message type designator)
Glossary Communication

OPR

Definition
Operator, Operate, Operative, Operating, Operational
Glossary Flight operations

OPS

Definition
Operations
Glossary Ground Operations

OSIP

Definition
Overhaul and Special Inspections Periods
Glossary Airworthiness

OT

Definition
Other Times
Glossary Flight planning Source: CASA

OTAC

Definition
Overseas Territories Aviation Circulars
Glossary Regulations Publications and charts Source: Air Safety Support International (UK)
Online version available at: https://www.casa.gov.au//resources-and-education/glossary
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