Abbreviations and definitions
On this page you can find common abbreviations and definitions used in Unmanned Aviation.
| AEC | Airspace Encounter Category |
| AEH | Airborne Electronic Hardware |
| AGL | Above Ground Level |
| AIP | Aeronautical Information Publication |
| AIS | Aeronautical Information Services |
| AMC | Airspace Management Cell |
| AMC | Acceptable Means of Compliance |
| ANSP | Air Navigation Service Provider |
| AO | Airspace Observer |
| ARC | Air Risk Class |
| ATC | Air Traffic Control |
| ATS | Air Traffic Services |
| BVLOS | Beyond Visual Line Of Sight |
| C2 | Command and Control |
| C3 | Command, Control and Communication |
| CAA | Civil Aviation Authority |
| CG | Center Of Gravity |
| CIS | Common Information Servise |
| CIV | Civil |
| Con Ops | Concept of Operations |
| CTR | Control Zone |
| DAA | Detect And Avoid |
| D-area | Danger Area |
| EASA | European Union Aviation Safety Agency |
| ERP | Emergency Response Plan |
| ESC | Electronic Speed Controller |
| EU | European Union |
| E-VLOS | Extended Visual Line Of Sight |
| FASP | Finnish Aviation Safety Program |
| FHSS | Frequency-Hopping Spread Spectrum |
| FIZ | Flight Information Zone |
| GM | Guidance Material |
| GNSS | Global Navigation Satellite System |
| GPS | Global Position System |
| GRC | Ground Risk Class |
| HMI | Human Machine Interface |
| IMU | Inertial Measurement Unit |
| ISM | Industrial, Scientific and Medical |
| JARUS | Joint Authorities for Rulemaking on Unmanned Systems |
| MCC | Multi-Crew Cooperation |
| METAR | Aviation Routine Weather Report in (Aeronautical) Meteorological Code |
| MIL | Military |
| MTOM | Maximum Take Off Mass |
| NAA | National Aviation Authority |
| NOTAM | Notice to Airmen |
| OM | Operations Manual |
| OSO | Operational Safety Objective |
| P-area | Prohibited Area |
| PDRA | Predefined Risk Assessment |
| R-area | Restriction Area |
| RBO | Risk-Based Oversight |
| RCP | Required Communication Performance |
| RF | Radio Frequency |
| RLP | Required C2 Link Performance |
| RP | Remote Pilot |
| RPAS | Remotely Piloted Aircraft System |
| RPS | Remote Pilot Station |
| SAIL | Specific Assurance and Integrity Level |
| SFC | Surface |
| SMM | Safety Management Manual |
| SORA | Specific Operations Risk Assessment |
| SPECI | Aviation Selected Special Weather Code in (Aeronautical) Meteorological Code |
| STS | Standard Scenario |
| SW | Software |
| TAF | Terminal Area Forecast |
| TCAS | Traffic Collision Avoidance System |
| TMA | Terminal Control Area |
| TMPR | Tactical Mitigation Performance Requirement |
| UA | Unmanned Aircraft |
| UAS | Unmanned Aircraft System |
| USSP | U-Space Service Provider |
| VLL | Very Low Level |
| VLOS | Visual Line Of Sight |
| VO | Visual Observer |