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This is a glossary of aviation abbreviations from the Australian CAA. The aviation jargon being rather standardised all over the world, it is 99% correct for use in Europe as well.
 


Browse the glossary using this index

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A

:
Amber
:
Air to air
:
Aircraft Autonomous Integrity Monitor
:
Above aerodrome level
:
Authorised Airworthiness Representative
:
Aircraft Based Augmentation System
:
Advance boundary information
:
Abeam
:
Aerodrome beacon
:
About
:
Above...
:
Altocumulus (met)
:
Advisory Circular (document supporting 1998 CASRs)
:
Aircraft communication addressing and reporting system (pronounced 'AY-CARS')
:
Airborne Collision Avoidance System
:
Area control centre
:
Aircraft
:
Advisory Circular Joint (issued by the JAA, can be followed by a country code)
:
Acknowledge
:
Altimeter check location
:
Aircraft classification number
:
Accept, accepted
:
Acrobatics
:
Active, activated, activity
:
Aerodrome
:
Airworthiness Directive
:
Advisory area
:
Authorised Design Approval Organisation
:
Aerodrome chart
:
Addition, additional
:
Automatic Direction Finding (equipment)
:
Air Defence Identification Zone
:
Adjacent
:
Aerodrome office
:
Advisory route
:
The address (when this abbreviation is used to request a repetition, the question (IMI) precedes the abbreviation, eg IMI ADS) (to be used in AFS as a procedure signal)
:
Automatic Dependent Surveillance
:
Automatic Dependent Surveillance - Broadcast
:
Automatic Dependent Surveillance - Contract
:
Automatic Dependent Surveillance Unit
:
Authorised Engineering Representative
:
Automatic flight control system
:
Aerodrome flight information service
:
Aircraft Flight Manual
:
Aeronautical fixed service
:
Aeronautical fixed telecommunication network
:
Agriculture
:
Again
:
Attorney-General's Department
:
Aircraft Ground Equipment
:
Above Ground Level
:
Artificial Horizon
:
Aeronautical Information Circular
:
Air traffic services inter-facitility data communications
:
Aeronautical Information Publication
:
Aeronautical Information Publication En-route
:
Aeronautical Information Regulation and Control
:
Aeronautical Information and Control
:
Air-Report
:
Aeronautical Information Service
:
Approach Lights
:
Alighting area
:
Aircraft Landing Area (for purpose of CAR 1988 92(1)(d))
:
Aircraft Landing Area/Helicopter Landing Site
:
Alert phase
:
Airworthiness Limitation Item
:
Approach lighting system
:
Approach Lighting System
:
Altitude
:
Alternate (aerodrome)
:
Alternate, Alternating (light alternates in colour)
:
Area minimum altitude
:
Acceptable Means of Compliance
:
Amend, Amended
:
Amendment (AIP amendment)
:
Aircraft Maintenance Engineer
:
Aircraft Maintenance Manual
:
Approved Maintenance Organisation
:
Aircraft Maintenance Program
:
Authorised Maintenance Personnel Assessor
:
Aircraft Maintenance Specialist
:
Above Mean Sea Level
:
Aeronautical mobile satellite service
:
Aircraft Maintenance Technician
:
Aeronautical Chart 1:500,000 (followed by name/title)
:
Air Navigation Order (now CAO)
:
Answer
:
Aviator Night Vision Imaging Systems
:
Air Operator
:
Air Operators Certificate
:
Aerodrome Obstacle Chart (followed by name/title)
:
Air Operators Certification Manual
:
Alcohol and Other Drug
:
Aircraft On Ground
:
Aircraft Owners and Pilots Association
:
Abbreviated Precision Approach Path Indicator (pronounced 'AY-PAPI')
:
Approach
:
Aircraft Parking/Docking Chart (followed by name/title)
:
Apron
:
Approach Control
:
April
:
Approximate, Approximately
:
Auxillary power unit
:
Approve, Approved, Approval
:
Approach with Vertical Guidance
:
Area QNH Zone
:
Area Chart
:
Aerodrome Rescue and Fire Fighting Service (sometimes referred to as RFFS)
:
Area Forecast
:
Aviation Reform Group
:
Aircraft Registration Holder
:
Airspace Risk Model
:
Aircraft Recovery Manual
:
Air traffic services reporting office
:
Air-Report (message type designator)
:
Aerodrome reference point
:
Automatic error correction
:
Arrive, Arrival
:
Arresting (specify (part of) aircraft arresting equipment)
:
Altostratus (meteorological)
:
As Soon as Possible
:
Ascend to or ascending
:
Accelerate-stop distance available
:
Altimetry System Error
:
Airborne Support Equipment
:
Approved Single-engine Turbine Aeroplane
:
Aviation Services Handbook
:
Air Speed Indicatort
:
Aviation Safety Index
:
Aviation Safety Incident Report
:
Asphalt
:
American Society for Testing Materials
:
At (followed by time at which weather change is forecast to occur)
:
Actual Time of Arrival
:
Air Transport Association
:
Air Traffic Control (in general)
:
Actual Time of Departure
:
Automatic Test Equipment
:
Aeronautical Telecommunication and Radio Navigation Services
:
Air Traffic Flow Management
:
Automatic terminal information service
:
Air traffic management
:
Aeronautical telecommunications network
:
Aviation Testing Officer
:
At.. (time or place)
:
Airline Transport Pilot Licence
:
Air Traffic Service(s)
:
Attention
:
Aerodrome traffic zone
:
August
:
Authorised, Authorisation
:
All Up Weight
:
Auxiliary
:
Available
:
Average
:
Aviation Gasoline
:
Airworthiness Bulletin
:
Aerial Work (Air work - general aviation)
:
Automatic Weather Station
:
Advise as to what time is available
:
Airway
:
Azimuth

B

:
Blue
:
Braking action
:
Cloud Base (met)
:
Beacon (aeronautical ground light)
:
Broadcast
:
Boundary
:
Becoming
:
Manually controlled mode for constant speed propellers or turbo prop aircraft
:
Before
:
Basic Instruction Package for Meteorologists
:
Basic Instruction Package for Meteorological Technicians
:
Built In Test Equipment
:
Broken (cloud descriptor) (met)
:
Blowing (followed by DU=dust, SA=sand or SN=snow)
:
Building
:
Below Clouds
:
Below
:
Bombing
:
Mist
:
Bearing
:
Braking
:
Brakes release weight
:
Broadcasting Station (Commercial)
:
Between Layers
:
Between

C

:
Centre (Runway)
:
Degrees Celsius (Centigrade)
:
Course Acquisition
:
Certified Air/Ground Radio Operator
:
Certified Air/Ground Radio Service
:
Civil Aviation Authority
:
Civil Aviation Authority New Zealand
:
Civil Aviation Advisory Publication
:
Certified Air Ground Radio Operation
:
Continuous Airworthiness Maintenance Program
:
Civil Aviation Order
:
Civil Aviation Regulation (1988) [existing]
:
Civil Aviation Regulation (1998) [now known as 1998 CASR)
:
Calibrated air speed
:
Civil Aviation Safety Authority
:
Civil Aviation Safety Regulation
:
Clear Air Turbulence
:
Category
:
Visibility, cloud and present weather better than prescribed values or conditions
:
Cumulonimbus (met)
:
Competency-based Training
:
Cirrocumulus (met)
:
Corrected meteorological message (for CCB, CCC..etc in sequence) (message type designator)
:
Capability Check Flight
:
Circuits
:
Candela
:
Critical Design Configuration Control Limit
:
Course Direction Indicator
:
Configuration Deviation List
:
Coordination (message type designator)
:
En Route and Area ATC unit
:
Chief Executive Officer
:
Clearance Expiry Time
:
Change Frequency to
:
Chief Flying Instructor (in the US: Certified Flight Instructor)
:
Controlled Flight into Terrain
:
Cleared Flight Level
:
Confirm, I confirm
:
Centre of gravity
:
Circling guidance light(s)
:
This is a channel continuity check of transmission to permit comparision of your record of channel-sequence numbers of messages received on the channel (to be used in AFS as a procedure signal)
:
Modification (message type designator)
:
Charter
:
Cirrus (met)
:
Common ICAO data interchange network
:
Near, Over Large Town(s)
:
Civil
:
Check
:
Centre Line
:
Clear type of ice formation
:
Calibration
:
Cloud (met)
:
Calling
:
Climbing Indicated Airspeed
:
Maximum Co-efficient of Lift
:
Clear, Cleared to... Clearance
:
Closed, Close, Closing
:
Climb to or Climbing to
:
Component Maintenance Manual
:
Completion, Completed, or Complete
:
Configuration, Maintenance and Procedures
:
Certification Maintenance Requirements
:
Commissioned
:
Flight plan cancellation message
:
Cancel
:
Communications, Navigation and Surveillance
:
Certificate of Airworthiness
:
Certificates of Approval (issued to maintenance organisations)
:
Communications
:
Concrete
:
Condition
:
Continuous
:
Construction, Constructed
:
Continue(s), Continued
:
Coordinate, Coordinated
:
Coordinates
:
Change over point
:
Certificate of Registration
:
Correct, Corrected, Correction
:
Conical Surface
:
At the Coast, Coastal
:
Cover, Covered, Covering
:
Chief Pilot
:
Controller-Pilot Data Link Communication
:
Current flight plan
:
Commercial Pilot Licence
:
Cyclic redundancy check
:
Crew Resource Management
:
Cruise
:
Call sign
:
Cirrostratus (met)
:
Common Support Data Dictionary published by the Air Transport Association of America (ATA). The CSDD replaces the WATOG.
:
Constant Speed Unit
:
Control Area
:
Common Traffic Advisory Frequency
:
Common Traffic Advisory Frequency - (Radio)
:
Climb to and maintain
:
Contact
:
Control
:
Caution
:
Control Zone
:
Cumulus (met)
:
Cumuliform (met)
:
Customs
:
Cockpit voice recorder
:
Carrier Wave
:
Clearway

D

:
Downward (tendency in RVR (Runway visual range) during previous 10 minutes)
:
Deleted
:
Data Link Automatic Terminal Information Service (pronounced'DEE-ATIS')
:
Data Link VOLMET
:
Danger Area (followed by identification)
:
Decision Altitude
:
Decision Altitude/Height
:
Dry Adiabatic Lapse Rate
:
Designated Aviation Medical Examiner
:
Designated Aviation Ophthamologist
:
Departure and Approach Procedures
:
Double channel duplex
:
Docking
:
Decommissioned
:
Direct Controller-Pilot Communications
:
Double channel simplex
:
Direct (in relation to flight plan clearances and type of approach)
:
December
:
Degrees
:
Depart, Departure, Departed, Departing, Departure Message
:
Designated Engineering Representative
:
Departure End of Runway
:
Descend to, Descending to
:
Destination
:
Distress Phase
:
Deviation, Deviating
:
Direction Finder/ Finding
:
Digital Flight Data Recorder
:
Distance from touchdown indicator
:
Distance Measuring Equipment or Global Positioning Satellite System Arrival
:
Decision Height
:
Diffuse
:
Displaced
:
Distance
:
Diversion, Divert, Diverting
:
Delay (message type designator)
:
Data Link Initiation Capability
:
Daily
:
Direct Maintenance Cost
:
Distance Measuring Equipment
:
DME (International)
:
DME (International Precision used in conjunction with Microwave Landing System)
:
Danger, Dangerous
:
Documents
:
Direct Operating Cost
:
Domestic
:
Dew Point Temperature
:
Discussion Paper
:
Depth
:
Dead Reckoning (navigation)
:
Low drifting (followed by DU=dust, SA=sand or SN=snow)
:
During
:
Dust storm
:
Double sideband
:
Descend to And Maintain
:
Date-Time Group
:
Displaced Runway Threshold
:
Deteriorate, Deteriorating
:
Dual tandem wheels
:
Dust
:
Dense Upper Cloud (met)
:
This is a duplicate message (to be used in Aeronautical Fixed Service as a procedure signal)
:
Duration
:
Doppler VOR
:
Dual wheels
:
Drizzle

E

:
East, East Longitude
:
European Aviaton Safety Agency
:
Expected Approach Time
:
Eastbound
:
European Civil Aviation Requirement (formerly JAR)
:
Extended Diversion Time Operations
:
Estimated Elapsed Time
:
Electronic Flight Bag
:
Expect further clearance
:
European Geostationary Navigation Overlay System
:
Enhanced Ground Proximity Warning System
:
Extremely high frequency (30,000 to 300,000 MHz)
:
Encumbrance Holder Register
:
Emergency locator beacon-aircraft
:
Elevation
:
Extra Long Range
:
Emergency Locator Transmitter (Survival)
:
Emission
:
Engine Manual
:
Explanatory Memorandum (submitted to EXCO with regulation amendment)
:
Embedded in a Layer (to indicate cumulonimbus embedded in layers of other clouds)
:
Emergency
:
Emergency Medical Service
:
Environment Management System
:
Stop-end (related to RVR)
:
Endurance
:
East North-East
:
Engine
:
En Route
:
En Route Chart (followed by name/title)
:
Estimated off Blocks Time
:
Environment Protection Agency
:
Electronic Position Indicating Radio Beacon (marine term.)
:
Equipment
:
Here..or herewith
:
En-route Chart
:
Emergency Response Plan
:
Explanatory Statement (tabled with regulations in Parliament)
:
Electrostatic sensitive discharge
:
ESD equipment
:
East Southeast
:
Electronic safety incident report
:
Estimate or estimated or estimate (message type designator)
:
Estimated Time of Arrival, Estimating Arrival
:
Engine trend and condition monitoring
:
Estimated Time of Departure, Estimating Departure
:
Estimated Time Over significant point
:
Extended range operations by turbine-engined aeroplanes
:
Equi Time Interval
:
Estimated Time Interval
:
Every
:
Except
:
Executive Council
:
Executive Council Secretariat
:
Exercises, Exercising, to exercise
:
Expect, Expected, Expecting
:
Extend, Extending, Extended

F

:
Fixed (chart symbol)
:
Federal Aviation Administration of the USA
:
Foreign Aircraft Air Operator's Certificate
:
Facility, Facilities
:
Full Authority Digital Engine Control
:
Final Approach Fix
:
Facilitation of International Air
:
Final Approach Point
:
Federal Aviation Regulations (Federal Aviation Administration, Department of Transportation, USA)
:
Final approach and take-off area
:
Final Approach Waypoint
:
Facsimile Transmission
:
Light (used to indicate the intensity of WX phenomena, interference or static reports, eg FBL RA = light rain). From the French word "faible"
:
Funnel Cloud (tornado or water spout)
:
Forecast
:
Friction coefficient
:
Fault Detection
:
Fault detection and exclusion (in relation to GPS equipment)
:
Fixed Distance Lighting
:
Flight Data Processing system
:
Flight Director System
:
February
:
Few (cloud descriptor)
:
Flood, Fire Relief
:
Fog
:
Flight Information Area
:
Flight Information Centre
:
Flight Information Office
:
Flight Information Region
:
Flight information service (automated)
:
Flight Information Service Station
:
Fault Isolation Manual
:
Flight Level
:
Field
:
Flashing
:
Forward Looking Infra Red
:
Flares
:
Flight
:
Flight check
:
Fluctuating, Fluctuation, Fluctuated
:
Follow(s), Following
:
Fly, Flying
:
From
:
From (followed by time weather change is forecast to begin)
:
Flight management system
:
Flight Management System
:
Flow Management Unit
:
Final Approach
:
Flight and Navigation Procedures Trainer
:
Foreign Object Damage
:
Flying Operations Inspector
:
Flight Plan Designator
:
Filed Flight Plan Message
:
Feet per Minute
:
Flight Plan Route
:
Fuel Remaining
:
Frequency
:
Friday
:
Fault Reporting Manual
:
Fatigue Risk Management System
:
Firing
:
Front (relating to weather)
:
Frequent
:
Flight Service (in general)
:
Full Stop Landing
:
Fish Spotting
:
Flight service station
:
First
:
Feet
:
Flight training device
:
Full time equivalent
:
Flight Training Organisation
:
Smoke
:
Fixed
:
Freezing
:
Freezing Drizzle
:
Freezing Fog
:
Freezing Level
:
Freezing Rain

G

:
Green
:
Gravity
:
Governor-General
:
Ground-to-air
:
Ground-to-air and air-to-ground
:
Go ahead, resume sending (to be used in AFS as a procedure signal)
:
General Aviation
:
General Aviation Aerodrome Procedures
:
Area forecast for low-level flights
:
Guild of Air Pilots and Navigators
:
Ground Based Augmentation System
:
Ground Controlled Approach
:
Geometric Dilution of Precision
:
General
:
Geographic, true
:
Ground Earth Station
:
Glider Flying
:
Ground handling agents
:
Gravity Induced Vestibular Dysfunction
:
Glider
:
Gravity Induced Loss of Consciousness
:
Global Orbiting Navigation Satellite System (pronounced 'GLO-NAS')
:
Guidance Material
:
Ground Movement Chart (followed by name/title)
:
Ground
:
Ground Check
:
Global Navigation System
:
Global navigation satellite system
:
Glide Path
:
FLG Group Flashing (number) (used in conjunction with aerodrome lighting)
:
Glide Path Intercept
:
Global positioning system (see GNSS)
:
Ground proximity warning system
:
Hail
:
Minimum Required Climb Gradient
:
Ground Based Regional Augmentation System
:
Grass Landing Area
:
Processed meteoroglogical data in the form of grid point values expressed in binary form (aeronautical meterological code)
:
Gravel
:
Small Hail and/or Snow Pellets
:
Groundspeed
:
Ground Support Equipment
:
Geoid Undulation

H

:
Continuous day and night service
:
Height Above Aerodrome
:
Head of Aircraft Maintenance
:
Head of Aircraft Maintenance Control
:
Helicopter approach path indicator
:
Height Above Threshold
:
Hazard Beacon
:
High frequency direction-finding station
:
Heading
:
Hours of Daylight Saving
:
Helicopter
:
High Frequency (3000 to 30,000 KHZ)
:
Human Factor and Error Management System
:
Heads-up Guidance System
:
Height, Height Above
:
High Intensity Approach Lighting
:
High Intensity Obstacle Lights
:
High Intensity Runway Lighting
:
Sunrise to Sunset (from French "Heures de Jour")
:
Holding
:
Helicopter Landing Site
:
Human-machine Interface
:
Sunset to Sunrise (from French "Heures de Nuit")
:
Service available to meet operational requirements
:
Head of Flying Operations
:
Holiday
:
Hospital Aircraft
:
Head of Training and Checking
:
Horse Power
:
HectoPascal
:
Hours
:
Service available during hours of scheduled operations
:
Hold Short Lights
:
Heads Up Display
:
Hurricane
:
High and very high frequency direction finding stations (at the same location)
:
Heavy (used to indicate the intensity of WX phenomena, eg HVY RA = heavy rain)
:
Heavy
:
No specific working hours
:
Higher
:
Haze
:
Hertz
:
Horizontal Surface

I

:
Inspection authorisation
:
Instrument approach chart (followed by name/title)
:
Initial Approach Fix
:
Instrument Approach and Landing Chart
:
In and out of clouds
:
Instrument Approach Plate
:
Intersection of air routes
:
Indicated air speed
:
International Air Transport Association
:
In Accordance With
:
Initial Approach Way-point
:
Identification Beacon
:
Ice Crystals (MET code)
:
Instructions for continuing airworthiness (issued by manufacturer or designer)
:
International Civil Aviation Organization
:
Icing, Ice
:
In-command Under Supervision
:
Identifier, identify
:
Identification
:
Intermediate Approach Fix
:
Instrument Flight
:
Identification Friend/Foe
:
Instrument flight rules
:
In-flight Shutdown
:
Implementation Group
:
International general aviation
:
Instrument Landing System
:
Inner Marker
:
Instrument meteorological conditions (other than VMC)
:
Indirect Maintenance Cost
:
Immigration
:
Interrogation sign
:
Improve, Improving, Improvement
:
Immediate, Immediately
:
Initial approach
:
Inbound
:
In Cloud
:
Uncertainty Phase
:
Information
:
Inoperative
:
If not possible
:
In progress
:
Inertial Navigation System
:
Install, Installed, Installation
:
Instrument
:
Intersection
:
Intermittent, Intermittently (meteorological)
:
International
:
Interrogator
:
Interrupt, Interruption, Interrupted
:
Intensify, Intensifying
:
Intensity
:
Indirect Operating Cost
:
Initial Operational Experience
:
Illustrated Parts Catalogue
:
Ice on runway
:
Instrument Training Examination
:
Immediately Reportable Matters
:
Internal Reporting System
:
International Standard Atmosphere
:
Independent Sideband
:
Integrated Safety Investigation Methodology
:
International Organization for Standardization
:
Isolated
:
Interstage Turbine Temperature
:
Illuminated Wind Indicator
:
Intermediate Way-point

J

:
Jet Barrier
:
Joint Aviation Authorities (of Europe)
:
January
:
Joint Aviation Requirements (of the European JAA)
:
JAR Operations
:
Saturday, Sunday and PH (from French "Jours FeriƩs")
:
Monday to Friday except PH (from French "Jours Ouvrables")
:
Joint Technical Standard Order
:
Jet Stream
:
July
:
June

K

:
Knowledge Deficiency Report
:
Kilograms
:
Kilohertz
:
Kilometers
:
Kilometers per Hour
:
Kilopascals
:
Knots
:
Kilowatts

L

:
Locator (see LM, LO)
:
Left (runway identification)
:
Local Area Augmentation System
:
Land and Hold Short Operations
:
Licensed Aircraft Maintenance Engineer
:
Inland
:
Latitude
:
Landing distance available
:
Landing
:
Landing Direction Indicator
:
Landing decision point
:
Length
:
Low Frequency (30 to 300 KHZ)
:
Light, Lighting
:
Lighted
:
Light Intensity High
:
Light Intensity Low
:
Light Intensity Medium
:
Low Intensity Obstacle Lights
:
Low Intensity Runway Lights
:
Low Jet Route
:
Lower Limit
:
Low-level Navigation (by the MIL)
:
Low Level Operations (by the MIL)
:
Localizer
:
Locator (middle)
:
Local mean time
:
Locator (outer)
:
Locally, Location, Located, Local
:
Lane of Entry
:
Longitude
:
Line Operations Safety Audit
:
Liquid Penetrant Test
:
Long-range communication system
:
Long Range
:
Line Replaceable Item
:
Long-range navigation system
:
Line Replaceable Unit
:
Light Sport Aircraft
:
Lowest safe altitude
:
Limited
:
Lowest Usable Level
:
Light and Variable (relating to wind)
:
Leave, Leaving
:
Level
:
Layer, Layered

M

:
Mach number (followed by figures ie .02 = Mach .02)
:
Metres (preceded by figures)
:
Multi-engine
:
Manual Authoring and Assessment Tool
:
Men and Equipment
:
Magnetic
:
Missed Approach Holding Way-point
:
Maintenance
:
Manual
:
Aeronautical Maps and Charts
:
Manifold Air Pressure
:
Missed Approach Point
:
March
:
At Sea
:
Maximum All Up Weight
:
Missed Approach Waypoint
:
Maximum
:
Microburst
:
Mandatory Broadcast Zone
:
Multi-crew Co-ordination
:
Maintenance control manual
:
Manual of criteria for the qualification of flight simulators ICAO Doc 9625-AN/938
:
Mean Cycles Between Unscheduled Removals
:
Modulated Continuous Wave
:
Minimum Descent Altitude
:
Medium Frequency Direction Finding Station
:
Major Defect Report
:
Minimum En-route Altitude
:
Medical
:
Minimum equipment list
:
Manufacturing, Engineering and Related Services Industry Training Advisory Body
:
REPORT Aviation routine weather report
:
Meteorological, Meteorology
:
Aviation routine weather report (in aeronautical meteorological code)
:
MET Radar
:
Medium Frequency (300 to 3000 KHZ)
:
Megahertz
:
Shallow Fog
:
Military
:
Military Standard
:
Minutes
:
Medium Intensity Obstacle Lights
:
Medium Intensity Runway Lights
:
Miscellaneous
:
Marker Radio Beacon
:
Military Low Jet
:
Military Low Jet Route
:
Microwave Landing System
:
Maximum Landing Weight
:
Middle Marker
:
Master minimum equipment list
:
Minimum
:
Monitor, Monitoring,
:
Maintain, Maintained, Maintaining
:
Military Operating Area
:
Minimum obstacle clearance (required)
:
Moderate (used to indicate the intensity of WX phenomena, interference or static reports, eg MOD RA = moderate rain).
:
Moderate, Moderately
:
Monday
:
Above Mountains
:
Minimum Operational Performance Standards
:
Manual of Standards
:
Move, Moved, Moving, Movement
:
Method of Working Plan
:
Maintenance Planning Data
:
Magnetic Particle Inspection
:
Multi-crew Pilot Licence (MPL)
:
Metres per Second
:
Magnetic Particle Inspection Technician
:
Maintenance Review Board
:
Maintenance Review Board Report
:
Medium Range
:
Maintenance, repair and overhaul
:
ATS/MET Reporting Point
:
Minus
:
Minimum sector altitude
:
Multi-function Transport Satellite (MTSAT) Satellite-based Augmentation System
:
Material Safety Data Sheets
:
Maintenance Steering Group
:
Message
:
Maintenance Steering Group Logic Process
:
Maintenance Significant Item
:
Mean Sea Level
:
Maintenance specific operation specification
:
Monopulse Secondary Surveillance Radar
:
Mountain
:
Mean Time Between Failure
:
Mean Time Between Removals
:
Mean Time Between Unscheduled Removals
:
Maintenance training organisation
:
Maximum take-off weight
:
Maximum Tyre Pressure
:
Multi-function Transport Satellite
:
Mean Time To Failure
:
Mean Time To Repair
:
Mean Time To Unscheduled Removal
:
Special Term For Data Transmittal
:
Mountain waves
:
Minimum Vector Altitude
:
Meteorological Watch Office
:
Mixed type of ice formation (white and clear)

N

:
North, North Latitude
:
Gas Generator Speed
:
Second Stage Turbine Speed
:
Non-acqueous Developer
:
National aeronautical information processing system
:
National Aerospace Non-destructive Testing Board
:
Notice Advisory to NavStar Users
:
Noise Abatement Procedures
:
National Airspace System
:
National AIS System Centre
:
National Airspace System Implementation Group
:
NAVAID Training
:
Navigation
:
Navigation Aid
:
Non-acqueous Wet Developer
:
Northbound
:
Not Before
:
No Change
:
Non-directional Radio Beacon
:
Non-destructive inspection
:
Non-destructive testing
:
Northeast
:
Negative, No. Permission not granted or, That is not correct
:
Gas Generator Speed
:
Night
:
None
:
Nautical Miles
:
Normal
:
North North-East
:
North North-West
:
International NOTAM Office
:
No Significant Change
:
Notice To Airmen
:
November
:
Normal Operating Zone
:
Propeller Speed
:
Non-precision approach (procedures at aerodromes)
:
Notice of proposed change (consultation for amendment to a MOS)
:
Notice of proposed rule making
:
Nil Significant Cloud
:
No TAF Amendment
:
National
:
Negative Torque Sensing System
:
National Transportation Safety Board (of the USA)
:
No-transgression zone
:
Night Vision Device
:
Night Vision Enhancement Devices
:
National vocational education and training
:
Night Visual Flight Rules
:
Night Vision Goggles (by the MIL)
:
Night Vision Imaging Systems
:
North-West
:
Next
:
New Zealand
:
New Zealand Civil Aviation Authority
:
New Zealand Standard

O

:
On Request
:
Outside Air Transport
:
Outside Air Temperature
:
Observe, Observed, Observation
:
Omni Bearing Selector
:
Obscure, Obscured, Obscuring
:
Obstacle
:
Obstruction
:
Operating Certificate
:
Obstacle Clearing Altitude
:
Oceanic Control Area
:
Occulting (light)
:
Obstacle Clearance Height
:
Occasional, Occasionally
:
October
:
Outside Control Area
:
Outside Control Zone
:
One Engine Inoperative
:
Original Equipment Manufacturer
:
Obstacle Free Zone
:
Overhead
:
Occupational Health and Safety Management Systems
:
Obstacle Identification Surface
:
Office of Legal Counsel
:
On-line Data Interchange
:
Obstacle Limitation Surface
:
Operations Manual
:
Outer Marker
:
Opaque, white type of ice formation
:
Office of Parliamentary Counsel
:
Operational Meteorological
:
Operational Notification Message (message type designator)
:
Open, Opening, Opened
:
Operator, Operate, Operative, Operating, Operational
:
Operations
:
Office of Regulation Review (at the Productivity Commission)
:
Overhaul and Special Inspections Periods
:
Other Times
:
Outlook (used in Sigmet messages for volcanic ash and tropical cyclones)
:
On Top
:
Outboard
:
Overcast
:
Over Water

P

:
Prohibited Area (followed by identification)
:
Precision Approach
:
Pilot Activated Lighting
:
Procedures for Air Navigation Services
:
Procedures for Air Navigation Services - Aircraft Operations (ICAO Doc 8168 Vol I and II)
:
Precision Approach Path Indicator
:
Precision Approach Radar
:
Parallel
:
Precision Approach Terrain Chart (followed by name/title)
:
Passengers
:
Power Plant Build-Up Manual
:
Personal Computer
:
Personal Computer-based Aviation Training Device
:
Proceed, Proceeding
:
Pilot Controlled Lighting
:
Pavement classification number
:
Practical consolidation training
:
Pre-Departure Clearance
:
Product distribution organisation
:
Positional Dilution of Precision
:
Pre-departure Service Check
:
Pressure Error Correction
:
Permanent
:
Porous Friction Course
:
Preferred Route
:
Public Holiday
:
Pre-flight information bulletin
:
Pilot-in-command
:
Pilot-in-Command Under Supervision
:
Practice ILS
:
Pilot Reports
:
Parachute Jumping Exercise
:
Ice Pellets
:
Flight Plan
:
Present Level
:
Primary Maintenance Process
:
Prior Notice Required
:
Point of No Return
:
Dust Devils
:
Persons on Board
:
Pilot Operating Handbook
:
Possible
:
Plan Position Indicator
:
Private Pilot Licence
:
Prior Permission Required
:
Precise Positioning Service
:
Present Position
:
Prohibited, Restricted and Danger Areas
:
Aerodrome Partially Covered by Fog (MET code)
:
Primary
:
Parking
:
Precision Runway Monitoring
:
Precision runway monitoring
:
Probable, Probability
:
Procedure
:
Provisional
:
Plus
:
Passing
:
Position
:
Pierced Steel Plank
:
Primary Surveillance Radar
:
Pressure System(s)
:
Portable
:
Procedure Turn
:
Push To Talk
:
Private
:
Power

Q

:
Magnetic Heading (zero wind)
:
Magnetic Bearing
:
Quick Engine Change Unit
:
An altimeter set to QFE will read zero when the aircraft is on the runway
:
Quality Management System
:
Altimeter subscale setting to obtain elevation or altitude
:
True Bearing
:
Qualification test guide
:
Quadrant

R

:
Right (runway system identification)
:
Red
:
Restricted Area (followed by number)
:
Radio Telephone
:
Rain
:
Rules of the Air and Air Traffic Services
:
Radius
:
Regional Area Forecast Centre
:
Runway Arresting Gear
:
Ragged
:
Runway Alignment Indicator
:
Receiver Autonomous Integrity Monitoring
:
Repair and Maintenance
:
Regulatory Advisory Panel
:
Regional Airspace Users Advisory Committee
:
Radar Picture (MET)
:
Radar Advisory Service
:
Regional AIS System Centre
:
RAM Air Turbine
:
Request For Corrective Action
:
Reach Cruising Altitude,
:
Rescue Coordination Centre
:
Reach, Reaching
:
Runway Centre Line
:
Runway Centre Line Lights
:
Runway Centre Line Marking
:
Radial
:
Radio
:
Recent (used to qualify weather phenomena, eg RERA = recent rain)
:
Receive, Receiver, Received
:
Runway Edge Lights
:
Reference to... Refer to...
:
Registration
:
Runway End Lights
:
Report, Reported, Reporting, Reporting Point
:
Request, Requested
:
Re-route
:
Reserve Fuel
:
Runway end safety area
:
Restrictions
:
Review
:
Regional Forecasting Centre (Met)
:
Request for change
:
Rescue and Fire Fighting Services
:
Radio Height
:
Right-hand Circuit
:
Reclearance in Flight
:
Restricted Instrument Flight Take-off
:
Radar information service
:
Report Leaving
:
Relay to
:
Runway Lead-in Lighting
:
Remark(s)
:
Root Mean Square
:
Area navigation
:
Required navigation performance
:
Registered operator
:
Regional OPMET Bulletin Exchanges
:
Rate of Climb
:
Rate of Descent
:
Route Forecast (in aeronautical meteorological code)
:
Rules and practices for aerodromes
:
Regulatory Performance Indicator
:
Runway Point of Intercept
:
Radar Position Indicator
:
Revolutions Per Minute
:
Regular public transport
:
Require(d)
:
Requirements
:
Report Reaching
:
Routine Reportable Matters
:
Rescue Sub-Centre
:
Runway Surface Condition
:
Responder Beacon
:
En route Surveillance Radar
:
Return to Base
:
Route
:
Radio Telephone
:
Runway Threshold Light(s)
:
Runway Threshold Identification Lights
:
Return, Returned, Returning
:
Registered training organisation
:
Rejected take-off
:
Return to Service
:
Runway Touchdown Zone Light(s)
:
Runway visual range
:
Reduced Vertical Separation Minimum
:
Runway Strip
:
Runway

S

:
South, South Latitude
:
Straight-In
:
Service Bulletin
:
Single-engine
:
Sand
:
Selective Availability
:
Situation Awareness
:
Supplementary Airline Licence
:
Saturated Adiabatic Lapse Rate
:
Simple Approach Lighting System
:
Search and Rescue
:
Standards and Recommended Practices (ICAO)
:
Time search action required
:
Search and Rescue Watch
:
Saturday
:
Satellite Communication
:
Southbound
:
Satellite Based Augmentation System
:
Stratocumulus
:
Safety Critical Personnel
:
Scattered (meteorological)
:
Standby
:
Standard Departure Clearance
:
Service difficulty report
:
South East
:
Sea (used in connection with sea-surface temperature and state of the sea)
:
Single engine aircraft only
:
Seconds
:
Section
:
Sector
:
Selective Calling System
:
September
:
Service, Servicing, Served
:
Severe (used eg to qualify icing and turbulence report)
:
Surface
:
Sequenced Flashing Lights
:
Snow Grains
:
Showers (followed by RA=rain, SN=snow, PL=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, eg, SHRASN = showers of rain and snow)
:
Super High Frequency (3,000 to 30,000 MHZ)
:
Shaft Horse Power
:
Standard instrument departure
:
Selective Identification
:
Significant
:
Information concerning en route weather phenomena which may affect the safety of aircraft operations
:
Service Information Letter
:
Simultaneous, or Simultaneously
:
Sky Clear
:
Schedule, Scheduled
:
Service Letter
:
Speed Limiting Point
:
Slow, Slowly
:
Safety Manager
:
Surface Movement Control
:
Surface Movement Radar
:
Safety management system
:
Snow
:
A special series NOTAM notifying the presence or removal of hazardous conditions due to snow, ice, slush or standing water associated with snow, slush and ice on the movement area
:
Start of Climb
:
Schedule of experience
:
System of Maintenance
:
Standard Operating Procedures
:
Start of TORA (take-off)
:
Single Pilot
:
Sport Aviation
:
Aviation Special Weather (in aeronautical meteorological code)
:
Specific Preflight Information Bulletin
:
Spotwind
:
Standard Positioning Service
:
Squall
:
Sunrise
:
Safety Review Board
:
Standard Radar Departure
:
Short Range
:
Structural Repair Manual
:
Search and Rescue Region
:
Secondary
:
Sunset
:
Sandstorm
:
Single Sideband
:
Senate Standing Committee on Regulations and Ordinances
:
South South-East
:
Structural Significant Item
:
System Schematics Manual
:
Secondary Surveillance Radar
:
Supersonic Transport
:
South South-West
:
Stratus
:
Straight in Approach
:
Standard instrumental arrival
:
Standard Arrival Route
:
Standard terminal arrival routes
:
Supplemental Type Certificate
:
Synthetic training device
:
Standard
:
Stratiform
:
Station
:
Stationary
:
Supplementary Take-off Distance
:
Short Take-off and Landing
:
Status
:
Stopway Light(s)
:
Subject to
:
Sunday
:
Supplement (AIP Supplement)
:
Regional Supplementary Procedures
:
Serviceable
:
Survey Operations
:
South-West
:
Soft Wet Surface
:
Stopway

T

:
Temperature
:
'T'Visual Approach Slope Indicator System (pronounced 'TEE-VAR-SIS')
:
Transition Altitude
:
Traffic advisory
:
Terminal Area Chart
:
Tactical Air Navigation Aid
:
Terminal Area Forcast
:
Tailwind
:
Terminal Area Surveillance Area
:
True Airspeed
:
Terminal Area Thunderstorm Service (meteorological term)
:
Terrain awareness and warning system
:
Taxiing, Taxi
:
To be advised
:
Time Between Overhauls
:
Type Certificate
:
Tropical Cyclone
:
Tropical Cyclone Advisory Centre
:
Traffic alert and collision avoidance system
:
Type certificate data sheet
:
Threshold Crossing Height
:
Training and Checking Organisation
:
Trans-continental Control Area
:
Towering Cumulus (met)
:
Tornado
:
Touchdown Zone
:
Technical Reason
:
Telephone
:
(Illustrated) Tool And Equipment Manual
:
Threat and Error Management
:
Temporary, Temporarily (meteorologically)
:
Terminal and En-route procedures
:
Traffic
:
Terrain Following Radar (by the MIL)
:
Touch and Go Landing
:
Taxiing Guidance System
:
Threshold
:
Through
:
Thursday
:
Traffic Information Broadcasts by Aircraft
:
Until
:
Until Past (place)
:
Time in service
:
Take-off
:
Touchdown and lift-off area
:
Transponder Landing System
:
Time Limited WIP (work in progress)
:
Terminal Control Area
:
Track Made Good
:
Turn Altitude
:
Training Needs Analysis
:
Turn Height
:
Transitional Surface
:
Top of Climb
:
Take-off distance available
:
Cloud Top
:
Take-off run available
:
Turbine Outlet Temperature
:
Turning Point
:
Track
:
Temporary Reserved Airspace
:
Transition
:
Transmits, Transmitter
:
A manned, powered hang-glider
:
Transition Level
:
Tropopause
:
Thunderstorm (followed by RA=rain, SN=snow, PE=ice pellets, GR=hail, GS=small hail and/or snow pellets or combinations thereof, eg TSRASN = thunderstorm with rain and snow)
:
Time Since Installation
:
Time Since Overhaul
:
Technical Standard Order
:
Trend Type Forecast
:
Trans Tasman Mutual Recognition Agreement
:
Tuesday
:
Turbulence
:
Aerodrome Control Tower, Aerodrome Control
:
Taxiway
:
Taxiway Link
:
Type of Aircraft
:
Typhoon

U

:
Unserviceable
:
Until Advised By
:
Unmanned aerial vehicles
:
UHF Direction Finding Stations
:
Uncontrolled Flight Into Terrain
:
Until Further Notice
:
Unable Higher Due Traffic
:
Ultra High Frequency (300 to 3,000 MHZ)
:
Upper Flight Information Region
:
Upper Limits
:
Unable
:
Unable to Approve
:
Universal Communications
:
Unlimited
:
Unlicensed
:
Unreliable
:
Federal Aviation Regulations (of the USA)
:
Upper Control Area
:
Coordinated Universal Time

V

:
Velocity
:
Take-off Decision Speed
:
Take-off Safety Speed (Applicable to Larger Multi-engine Aircraft)
:
Volcanic Ash
:
Maximum Manoeuvring Speed
:
Visual Approach Area - Helicopter
:
Volcanic Ash Advisory Centre
:
Visual Approach Chart ( followed by name/title)
:
In Valleys
:
Magnetic Variation
:
Visual Approach Slope Indicator System
:
Vicinity of the aerodrome (followed by FG=fog, FC=funnel cloud, PO=dust/sand whirls, BLDU=blowing dust, BLSA=blowing sand or BLSN=blowing snow; eg, VCFG=vicinity fog
:
Vicinity
:
VHF Direction Finding Station
:
Vertical
:
Flap Extension Speed
:
Visual Flight Rules
:
Very High Frequency (30 to 300 MHZ)
:
By way of...
:
Maximum Drag Speed
:
Very Important Person
:
Visibility
:
Maximum Speed with Landing Gear Extended
:
Very Low Frequency (3 to 30 KHZ)
:
Very Light Jet
:
Landing Gear Operating
:
Landing Gear Operation Down
:
Very Long Range
:
Visual Maneouvre Speed
:
Visual Meteorological Conditions
:
Minimum Control Speed
:
Minimum Control Airspeed Airborne (Red line speed)
:
Minimum Control Airspeed on the Ground
:
Vertical Navigation
:
Never Exceed Speed
:
Maximum Structural Cruising Speed
:
Normal Operating Speed
:
Meteorological Information for Aircraft in Flight
:
VHF Omni-directional Radio Range (OMNI)
:
Variable Pitch Propellers
:
The speed at which the aircraft is rotated to lift off from the runway
:
Variable
:
Vertical Speed Indicator
:
Clean Stall Speed (Usually VS1 though)
:
Vertical speed limit
:
Stalling speed, minimum steady flight speed in the landing configuration
:
Stall speed with undercarriage and flap selected (Usually VS0, with a zero)
:
Safe single-engine Speed
:
Visual Terminal Chart
:
Vertical take-off and landing
:
Take-off Safely Speed
:
Best Angle of Climb Speed
:
Best Single-engine Angle of Climb Speed
:
Best Rate of Climb Speed
:
Best Single-engine Rate of Climb Speed (Blue line speed)

W

:
White
:
West, West Longitude
:
Wind Velocity
:
Wide Area Augmentation System
:
World Aeronautical Chart ICAO 1:1,000,000 (followed by name/title)
:
World Area Forecast Centre
:
World Area Forecast System
:
Weather and Terminal Information Rectifier
:
World Airlines Technical Operations Glossary
:
Westbound
:
Weight And Balance Manual
:
Wind Direction Indicator
:
Widespread
:
Wednesday
:
With Effect From, Effective From
:
World Geodetic System 1984
:
Within
:
Width
:
With Immediate Effect, Effective Immediately
:
Will Comply
:
Wind (used in connection with direction and speed) WINTEM Forecast upper wind and temperature at specified points (in aeronautical met code)
:
Work in Progress
:
Weaken, Weakening
:
Wiring Manual
:
World Meteorological Organisation
:
West North-West
:
Without
:
Way-point
:
Warning
:
Wind Shear
:
West South-West
:
Weight
:
Water Spout
:
World Wide Web
:
Weather

X

:
Cross
:
Crossbar (of approach lighting system)
:
Crossing
:
Atmospherics
:
Extra Section

Y

:
Yellow
:
Yellow Caution Zone
:
Your/s

Z

:
Coordinated Universal Time (in meteorological messages)

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