| Term | Definition |
|---|---|
| A2 CofC | A2 Certificate of Competency |
| AAE | Atypical Air Environment |
| AAIB | Air Accidents Investigation Branch |
| AAM | Advanced Air Mobility (JARUS SORA) |
| ACAS | Airborne Collision Avoidance System |
| ACP | Airspace Change Proposal |
| AD | Airworthiness Directive |
| ADQ | Aeronautical Data Quality |
| ADS-B | Automatic Dependent Surveillance - Broadcast |
| AEC | Airspace Encounter Categories (JARUS SORA) |
| AEH | Airspace Electronic Hardware (JARUS SORA) |
| AFIS | Aerodrome Flight Information Service |
| AGL | Above Ground Level |
| AIAA | Area of Intense Aerial Activity |
| AIC | Aeronautical Information Circular |
| AIP | Aeronautical Information Publication |
| Airprox | Air Proximity Hazard |
| AIS | Aeronautical Information System |
| ALARP | As Low As Reasonably Practicable |
| ALoSP | Acceptable Level of Safety Performance |
| AltMoC | Alternative Means of Compliance |
| AM | Accountable Manager |
| AMC | Acceptable Means of Compliance |
| AMSL | Above Mean Sea Level |
| ANO | Air Navigation Order |
| ANSP | Air Navigation Service Provider |
| AO | Airspace Observer |
| AOC | Air Operator Certificate |
| AOO | Area of Operation |
| APU | Auxiliary Power Unit |
| AR Ops | Airspace Regulation Operations (CAA) |
| ARC | Air Risk Class (JARUS SORA) |
| ASL | Above Surface Level |
| ASTM | American Society for Testing and Materials |
| ATC | Air Traffic Control |
| ATCO | Air Traffic Control Officer |
| ATM | Air Traffic Management |
| ATPL | Airline Transport Pilot Licence |
| ATS | Air Traffic Service |
| ATSU | Air Traffic Service Unit |
| ATZ | Aerodrome Traffic Zone |
| AUP | Airspace User Portal |
| BASA | Bilateral Aviation Safety Agreement |
| BGA | British Gliding Association |
| BITE | Built-In Test Equipment |
| BMFA | British Model Flying Association |
| BR | Basic Regulation |
| BRLOS | Beyond Radio Line of Sight |
| BSI | British Standards Institution |
| BVLOS | Beyond Visual line of Sight |
| C2 | Command and Control |
| C3 | Command, Control and Communication (JARUS SORA) |
| CAA | Civil Aviation Authority |
| CAP | Civil Aviation Publication |
| CAS | Controlled Airspace |
| CAT | Commercial Air Transport |
| CG | Centre of Gravity |
| CofA | Certificate of Airworthiness |
| CofC | Certificate of Conformance |
| ConOps | Concept of Operations |
| COR | Containment Requirements |
| COT | Containment Requirements (Tether) |
| COTS | Commercial Off-The-Shelf |
| CPL | Commercial Pilot Licence |
| Crit | Criterion |
| CRM | Crew Resource Management |
| CS | Certification Specification |
| CSP | Communication Service Provider |
| CTR | Control Traffic Region |
| CU | Command Unit |
| DA | Danger Area (Airspace) |
| DA | Design Approval (Airworthiness |
| DAA | Detect and Avoid |
| DAAIS | Danger Area Activity Information Service |
| DACS | Danger Area Crossing Service |
| DAL | Design Assurance Level |
| DfT | Department for Transport |
| DG | Dangerous Goods |
| DiSCO | Digital Specific Category Operations (project overview) |
| DMARES | Drone and Model Aircraft Registration and Education Service |
| DOA | Design Organisation Approval |
| DSCO | Digital Specific Category Operations |
| e-VTOL | Electric Vertical Take-Off and Landing |
| EASA | European Union Aviation Safety Agency |
| EC | Electronic Conspicuity |
| EC | European Commission |
| ECCAIRS | European Co-ordination Centre for Accident and Incident Reporting Systems |
| ELS | Emergency Landing Site |
| EMI | Electromagnetic Interference |
| ENR (X.X) | En-Route (AIP section) |
| ENSF | Enhanced Non-Standard Flight |
| ERA | Emergency Response Action |
| ERF | Emergency Restriction of Flying |
| ERP | Emergency Response Plan |
| ESD | Electrostatic Discharge |
| ETSO | European Technical Standard Order (EASA) |
| EU | European Union |
| EVLOS | Extended Visual Line of Sight |
| FAA | Federal Aviation Administration |
| FHSS | Frequency-Hopping Spread Spectrum |
| FIR | Flight Information Region |
| FIS | Flight Information Service |
| FISO | Flight Information Service Officer |
| FL | Flight Level |
| FLARM | Flight Alarm |
| FMC | Flight Management Computer |
| FMS | Flight Management System |
| FOD | Foreign Object Debris |
| FPV | First Person View |
| FRTOL | Flight Radio Telephony Operators' Licence |
| FRZ | Flight Restriction Zone |
| FSTD | Flight Simulation Training Device |
| FTB | Functional Test Based |
| FTS | Flight Termination System |
| FW | Fixed Wing |
| GA | General Aviation |
| GM | Guidance Material |
| GNSS | Global Navigation Satellite System |
| GPS | Global Positioning System |
| GRC | Ground Risk Class (JARUS SORA) |
| GVC | General VLOS Certificate |
| HALE | High Altitude Long Endurance |
| HF | Human Factors |
| HF | High Frequency (Radio Communication) |
| HIRF | Hight Intensity Radiated Field |
| HIRTA | High Intensity Radio Transmission Area |
| HLS | Helicopter Landing Site |
| HMI | Human-Machine Interface |
| HOD | Hook-On Device |
| HZ | Hertz |
| IAP | Instrument Approach Procedure |
| iARC | Initial Air Risk Class (JARUS SORA) |
| ICAO | International Civil Aviation Organisation |
| ICO | Information Commissioner's Office |
| ID | Identification |
| IFP | Instrument Flight Procedures |
| IFR | Instrument Flight Rules |
| iGRC | Intrinsic Ground Risk Class (JARUS SORA) |
| IMC | Instrument Meteorological Conditions |
| IMSAFE | Illness, Medication, Stress, Alcohol, Fatigue, Emotion |
| IMU | Inertial Measurement Unit |
| IP | Ingress Protection |
| IR | UAS Implementing Regulation |
| ISA | International Standard Atmosphere |
| ISM | Industrial, Scientific, and Medical |
| ISO | International Organization for Standardisation |
| ITU | International Telecommunication Union |
| JARUS | Joint Authorities for Rulemaking on Unmanned Systems |
| KE | Kinetic Energy |
| LFA | Low Flying Area |
| LIDAR | Light Detection and Ranging |
| LMA | Large Model Association |
| LOA | Level of Assurance |
| LOC | Loss of Control |
| LODA | Letter of Design Approval |
| LOI | Level of Integrity |
| LUC | Light Unmanned Aircraft System Operator Certificate |
| MAA | Military Aviation Authority |
| MAC | Mid-Air Collision |
| MAMC | Military Airspace Management Cell |
| MASPS | Minimum Aviation System Performance Standards |
| MCC | Multi-Crew Coordination (JARUS SORA) |
| METAR | Meteorological Terminal Aviation Report |
| MOD | Ministry of Defence |
| MOPS | Minimum Operational Performance Specification |
| MOR | Mandatory Occurrence Report |
| MORS | Mandatory Occurrence Report Scheme |
| MoU | Memorandum of Understanding |
| MR | Multirotor |
| MSO | Multiple Simultaneous Operations |
| MTOM | Maximum Take-Off Mass |
| NAA | National Aviation Authority |
| NATS | National Air Traffic Services |
| NM | Nautical Miles |
| NMAC | Near Mid-Air Collision |
| NOTAM | Notice to Airmen |
| NSF | Non-Standard Flight |
| OA | Operational Authorisation |
| OAT | Outside Air Temperature |
| OC | Operating Certificate |
| Ofcom | Office of Communications |
| OM | Operations Manual |
| OM | Operations Manual |
| ORA | Operational Risk Assessment |
| OSC | Operating Safety Case (Legacy Term superseded by ORA) |
| OSD | On Screen Display |
| OSO | Operational Safety Objective |
| PBO | Performance-Based Oversight |
| PBR | Performance Based Regulation |
| PDRA | Pre-Defined Risk Assessment |
| PfCO | Permission for Commercial Operations (Legacy Term superseded by OA) |
| PSR | Primary Surveillance Radar |
| PTF | Permit to Fly |
| R | Requirement |
| R&D | Research and Development |
| R(TC) | Restricted Type Certificate |
| RA | Risk Assessment |
| RA(T) | Restricted Area (Temporary) |
| RADALT | Radio Altimeter |
| RADAR | Radio Detection and Ranging |
| RAE | Recognised Assessment Entity |
| RAE(F) | Recognised Assessment Entity for Flightworthiness |
| RCM | Remote Crew Member (JARUS SORA) |
| RCP | Required Communication Performance (JARUS SORA) |
| RF | Radio Frequency |
| RLOS | Radio Line of Sight |
| RLP | Required C2 Link Performance (JARUS SORA) |
| RMZ | Radio Mandatory Zone |
| RP | Remote Pilot |
| RPA | Remotely Piloted Aircraft |
| RPAS | Remotely Piloted Aircraft System |
| RPL | Remote Pilot's Licence |
| RPS | Remote Pilot Station (ICAO) |
| RPZ | Runway Protection Zone |
| RSMS | Regulatory Safety Management System |
| RT | Radiotelephony |
| RTCA | Radio Technical Commission for Aeronautics (US) |
| RTH | Return to Home |
| RTSA | Railway and Transport Safety Act |
| S&A | See and Avoid |
| SAA | Scottish Aeromodellers Association |
| SAIL | Specific Assurance and Integrity Level |
| SARG | Safety and Airspace Regulation Group (CAA) |
| SARPs | Standards and Recommended Practices |
| SB | Service Bulletin |
| SC | Safety Culture |
| SC | Special Conditions |
| SD | Safety Directive (CAA) |
| SERA | Standardised European Rules of the Air |
| SI | Statutory Instrument |
| SID | Standard Instrument Departure |
| SIL | Service Information Letter |
| SKU | Stock Keeping Unit |
| SLA | Service Level Agreement |
| SMM | Safety Management Manual |
| SMS | Safety Management System |
| SN | Safety Notice (CAA) |
| SOP | Standard Operating Procedure |
| SORA | Specific Operations Risk Assessment |
| SPI | Safety Performance Indicator |
| SPOF | Single Point of Failure |
| SPT | Safety Performance Target |
| SRG | Safety Regulation Group |
| SSD | Significant Standards Differences |
| SSR | Secondary Surveillance Radar |
| STANAG | Standardization Agreement |
| STAR | Standard Arrival Route |
| STC | Supplemental Type Certificate |
| STS | Standard Scenario (JARUS SORA) |
| SUA | Special Use Airspace |
| SW | Software (JARUS SORA) |
| TAF | Terminal Area Forecast |
| TAFOR | Terminal Area Forecast |
| TC | Type Certificate |
| TCAS | Traffic Collision Avoidance System |
| TCB | Type Certification Basis |
| TCDS | Type Certificate Data Sheet |
| TDA | Temporary Danger Area |
| TIP | Technical Implementation Procedures |
| TLOS | Target Level of Safety |
| TMPR | Tactical Mitigation Performance Requirements |
| TMZ | Transponder Mandatory Zone |
| TOAL | Take-Off and Landing |
| TOLA | Take-Off and Landing Area |
| TPM | Technical Procedures Manual |
| TRA | Temporary Reserved Area |
| TSA | Temporary Segregated Area |
| TSO | Technical Standard Order (FAA) |
| TTA | Tactical Training Area |
| UA | Unmanned Aircraft |
| UAM | Urban Air Mobility |
| UAS | Unmanned Aircraft System(s) |
| UHF | Ultra High Frequency |
| UIR | Upper Flight Information Region |
| UK | United Kingdom of Great Britain and Northern Ireland |
| UN | United Nations |
| UTM | Uncrewed Aircraft System (UAS) Traffic Management |
| VFR | Visual Flight Rules |
| VHF | Very High Frequency |
| VLOS | Visual Line of Sight |
| VMC | Visual Meteorological Conditions |
| VO | Visual Observer |
| VTOL | Vertical Take-Off and Landing |
| WA | Working Arrangement |
Exported from CAP722D.uk 07-Jan-26 22:17