Glossary

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

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OCTA

Definition
Outside Control Area
Glossary Navigation

OCTR

Definition
Outside Control Zone
Glossary Navigation

OEI

Definition
One Engine Inoperative
Glossary Measurement Source: AIS

OEM

Definition
Original Equipment Manufacturer
Glossary Airworthiness

OFZ

Definition
Obstacle Free Zone
Glossary Flight planning

OHD

Definition
Overhead
Glossary Cabin Safety

OHS

Definition
Occupation Health and Safety
Glossary Safety

OHSMS

Definition
Occupational Health and Safety Management Systems
Glossary Safety

OIS

Definition
Obstacle Identification Surface
Glossary Aerodrome

OLC

Definition
Office of Legal Counsel
Glossary Organisation

OLDI

Definition
On-line Data Interchange
Glossary Systems

OLS

Definition
Obstacle Limitation Surface
Glossary Aerodrome

OM

Definition
Operations Manual
Glossary Manuals and handbooks

OM

Definition
Outer Marker
Glossary Navigation

OPA

Definition
Opaque, white type of ice formation
Glossary Meteorology
Online version available at: https://www.casa.gov.au//resources-and-education/glossary
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