Abbreviation’s What Does It Mean?

Absolute Accuracy  

Absolute Accuracy is the degree to which mapped drone data aligns with true real-world geographic coordinates. It is typically measured in centimetres and depends on GNSS correction methods such as RTK or PPK. 

Accelerometer 

A device that measures acceleration or fast changes in movement. The flight controller (the drone’s central processing unit) uses an accelerometer for the UAVs for flight stabilisation. 

AGL (Above Ground Level) 

Refers to the altitude above the ground immediately under the UAV. For example, a UAV flying 100 feet above a 45-foot hill would have an AGL of 55 feet. 

Altitude Hold 

A feature that allows drones to maintain a consistent altitude above ground level, using barometric pressure sensors or ultrasonic sensors to stabilise the drone at a certain height, facilitating easier control and stable video or photo capture. 

Anti-Collision Systems 

Technologies integrated into drones to detect and avoid potential collisions with obstacles, other aircraft, or objects in the environment. Sensors assess the drone’s surroundings and implement collision avoidance manoeuvres, enhancing flight safety. 

ATC (Air Traffic Control) 

A service provided by personnel trained and certified by the CAA responsible for monitoring and controlling all air traffic within a specific area. 

Autel Robotics 

Autel Robotics, founded in 2014 in Shenzhen, China, is a drone manufacturer, known for its X-Star, Evo, and Dragon Fish series drones. It gained market traction, especially in the United States, where it held a 7% market share in 2021. Autel Robotics has a diverse product line catering to various users, including the ultra-light EVO Nano+ and the EVO Max intended for emergency response. 

Autonomous Flight 

The capability of a drone to operate and navigate without direct human input. These drones are programmed to perform specific tasks or follow predefined routes using onboard sensors and algorithms. 

AAIB 

Air Accident Investigation Board 

AMSL 

Above Mean Sea Level 

ANO 

Air Navigation Order 

ATZ 

Air Traffic Zone 

Battery Management System (BMS) 

A technology that oversees the rechargeable battery of a drone, ensuring safety, efficiency, and longevity. It monitors the battery’s state, calculates secondary data, reports that data, controls the environment, and balances the battery. 

Beyond Visual Line of Sight (BVLOS) 

A type of drone operation conducted without the pilot maintaining direct visual contact with the aircraft. BVLOS operations typically require regulatory authorisation and defined command-and-control and safety procedures. 

C 

C2 Link (Command and Control Link) 

A Command and Control (C2) Link is the communication connection between a drone and its ground control station. It transmits flight commands to the aircraft and returns telemetry, system status, and video data to the operator. 

Collision Avoidance System 

System designed to prevent drones from colliding with obstacles such as buildings, trees, or other aircraft.   

Controller 

The device used by the operator to control the drone’s flight. Controllers can vary significantly in complexity and functionality. 

Collision/obstacle Avoidance 

A vision system that allows UAVs to detect obstacles in its path and avoid collisions. 

Commercial Drones 

An unmanned aerial system (UAS) designed for heavy use. These flying platforms have a specific purpose in mind such as for infrared inspection, package delivery, or for search and rescue. Typical models of drones include the DJI Matrice 350 RTK and Autel EVO II Dual 640T. 

CAA 

Civil Aviation Authority 

CAP 

Civil Aviation Publication 

DEM (Digital Elevation Model) 

A Digital Elevation Model (DEM) is a 3D representation of the Earth’s bare ground surface that excludes buildings and vegetation. DEMs are generated from LiDAR or photogrammetry data and are used in terrain analysis and engineering planning. 

Detect and Avoid (DAA) 

Detect and Avoid (DAA) is a system or procedure that enables a drone to identify and avoid other aircraft or obstacles during flight. DAA capabilities are associated with advanced operations where visual separation by the pilot is not maintained. 

Digital Surface Model (DSM) 

A Digital Surface Model (DSM) is a representation of the Earth’s surface that includes buildings, vegetation, and other above-ground features. DSMs are commonly produced from LiDAR or photogrammetry datasets. 

DJI (Dà Jiāng Chuàngxīn ) 

DJI, also known as SZ DJI Technology Co., Ltd., is a Chinese technology company founded in 2006 by Frank Wang. It specializes in manufacturing unmanned aerial vehicles (UAVs), also known as drones, for aerial photography and videography. DJI is headquartered in Shenzhen, Guangdong, and has become a leading name in drone technology, commanding about 76% of the global consumer drone market as of March 2021. The company’s products are utilized across various sectors, including filmmaking, agriculture, conservation, and by military and police forces. DJI’s product line includes drones, camera systems, gimbal stabilizers, propulsion systems, and robotics, among others 

Drone 

An unmanned aircraft that can fly autonomously or be controlled remotely. Drones are used for a variety of purposes, including aerial photography, surveillance, agriculture, search and rescue, and entertainment. 

Drone-in-a-Box 

Drone-in-a-Box is an automated docking system that houses, charges, and deploys a drone without continuous on-site pilot interaction. These systems are used in remote operations and scheduled monitoring deployments. 

Dual Operator Control 

An advanced feature where a drone can automatically return to its launch point or to the operator’s location if it loses connection with the controller or if the battery reaches a critically low level. Unlike basic RTH, dynamic RTH adjusts the return path in real-time to avoid obstacles and ensure a safe landing. 

DTM 

Digital Terrain Model 

ESC (Electronic Speed Controller) 

An electronic circuit used to vary the speed of an electric motor in a drone. It plays a crucial role in controlling the direction and speed of the drone’s propellers. 

Elevation Mapping 

The process of creating detailed maps that show variations in elevation of a particular area. This is especially useful in agriculture, construction, and surveying for understanding terrain. 

Encryption 

Encryption is the process of protecting drone communications and stored data using cryptographic methods. It secures telemetry, video feeds, flight logs, imagery, and other transmitted data from unauthorized access to preserve integrity and privacy. 

Exclusion Zone 

A designated area where drone flights are restricted or forbidden, typically around airports, military bases, or sensitive infrastructures for safety and security reasons. 

ELOS 

Extended Line of Site 

Fail-Safe 

A pre-programmed procedure that a drone follows in case of a system failure or signal loss, such as returning to a home point or landing immediately to ensure safety. 

Field of View (FOV) 

Describes the viewing angle from the camera of the drone. 

Firmware 

The software embedded in the drone’s flight controller, batteries, or remote controller. Updates to the firmware are often made available by manufacturers to fix bugs, introduce new features, improve existing features, and protect from security vulnerabilities. 

Fixed wing drones 

UAVs that consist of a rigid wing that generates lift via aerofoil and typically a small push propeller. Fixed wing drones can travel greater distances with less power due to the wing. 

Flight Controller 

The central component of a drone that receives the inputs from the sensors (gyroscope, accelerometer, GPS, vision sensors, ultrasonic sensors) and remote controller of the drone which then sends inputs to the electronic speed controls and motors about how the drone should move. 

Follow Me Mode 

An autonomous flight mode where a drone follows a moving object or person, often used in action sports filming or to capture dynamic video shots without manual control. 

FPV (First-Person View) 

A method used to control a drone from the pilot’s perspective, as if they were onboard. It involves live streaming the video from a camera on the drone to a screen, monitor, or goggles worn by the pilot. 

Geo-Caging 

Geo-caging is a restriction that prevents a drone from leaving a defined geographic boundary. Unlike geofencing, which may provide warnings, geo-caging enforces strict containment within approved areas. 

Gimbal 

A pivoted support that allows the rotation of an object (typically a camera in drones) about a single axis. It can stabilize the camera to keep it level despite the movement of the drone. 

Geofencing 

A virtual geographic boundary, defined by GPS or RFID technology, that enables software to trigger a response when a drone enters or leaves a particular area. It’s used for safety and regulatory compliance. 

GPS (Global Positioning System) 

GPS (Global Positioning System) is a satellite-based navigation system that provides positioning and timing information. In drone operations, GPS may operate alongside other satellite constellations under GNSS to improve positioning reliability 

Ground Station 

The control centre for drone operations, which can be a physical location or software that provides telemetry and allows the operator to control the drone remotely. 

GIS 

Geographic Information Systems 

Hover 

The ability of a drone to remain in a fixed position in the air without moving forward or backward, achieved through precise control of its flight dynamics. 

Headless Mode 

A feature on some drones that simplifies steering by ensuring that the drone moves in relation to the controller’s direction rather than its own front and back. 

Height Hold 

A flight mode that allows a drone to maintain a consistent altitude, utilising sensors such as barometers and ultrasonic altimeters. 

Home Point 

The location to which a drone is programmed to return if it loses connection with the controller or when the return to home (RTH) function is activated. 

IMU (Inertial Measurement Unit) 

A device used to measure the drone’s velocity, orientation, and gravitational forces, utilising a combination of accelerometers and gyroscopes. Essential for flight stability and navigation. 

IP Rating (Ingress Protection Rating) 

A standard that defines the levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies and moisture. It’s important for drones used in adverse weather conditions. 

ISO (for Drone Cameras) 

ISO in photography refers to the camera’s sensitivity to light, impacting the brightness of photos. Higher ISO settings make images brighter, useful in darker environments, but can introduce grain or noise, affecting image quality. Common ISO values range from 100 (low) to 6400 (high), with the base ISO providing the highest image quality with minimal noise. Adjusting ISO is essential for achieving desired exposure, especially in varying light conditions. 

While “ISO” stands for the International Organisation for Standardisation, it doesn’t directly refer the organisation itself. It’s from the combination of two film sensitivity standards (ASA and DIN) into one ISO standard in 1974, which was later adapted for digital photography to maintain similar brightness levels as film. This standardisation helps ensure consistency across different cameras and settings. 

Intelligent Flight Modes 

Autonomous flight features programmed into drones, allowing them to perform complex manoeuvres and tasks without manual input, such as following waypoints, orbiting an object, or tracking moving subjects. 

iOSD 

Intelligent On-Screen Display 

Kinematic GPS 

High-precision satellite navigation technique that uses multiple GPS receivers to measure the relative position with much greater accuracy than standard GPS. It’s crucial for applications requiring precise location data, such as surveying and mapping drones. 

LAS / LAZ File 

A LAS file is a standard format used to store LiDAR point cloud data. A LAZ file is a compressed version of the LAS format that reduces file size while preserving coordinate information. 

LiDAR (Light Detection and Ranging) 

LiDAR (Light Detection and Ranging) is a remote sensing technology that uses laser pulses to measure distances by illuminating a target and analysing the reflected light. Drone-mounted LiDAR systems generate point cloud data used to create elevation models, high-resolution maps, and 3D representations of terrain and structures. LiDAR is also applied in surveying, landscape analysis, and certain navigation systems for obstacle detection. 

Lithium Polymer (LiPo) Batteries 

A type of rechargeable battery that offers high energy density and lightweight characteristics, making them ideal for powering drones. LiPo batteries are known for their ability to deliver high current for rapid movements and long flight times. 

Lost Link Procedure 

A Lost Link Procedure is a predefined response executed when communication between a drone and its controller is interrupted. Common actions include return-to-home or controlled landing. 

Microdrone 

Microdrones are a class of small drones, often weighing less than a few pounds and capable of operating in confined spaces. They are used for various applications, including surveillance, photography, and hobbyist activities. Their compact size allows them to be highly manoeuvrable and less obtrusive than larger drone models. 

S Mode 

Also known as Sports Mode, the S Mode allows the DJI drone to fly and manoeuvre twice as fast (about 40 mph to 65 mph) 

P Mode 

This is the standard flight mode for most pilots. In the P Mode, all sensors on the drone are active including GPS and infrared sensors. This allows precise hovering of the drone, even if the user stops controlling it with the remote controller. 

A Mode 

The A Mode or Atti Mode is short for Attitude Mode, where the drone will maintain a certain altitude but not position. This allows the drone to remain at the same height but drift around. 

Multirotor 

Multirotor drones are aircraft with multiple rotors, typically four (quadcopters), six (hexacopters), or eight (octocopters). These drones are known for their stability, manoeuvrability, and vertical take-off and landing (VTOL) capabilities. Multirotor drones are widely used for photography, surveying, and recreational purposes. 

OAT 

Maximum Outside Air Temperature 

MOR 

Mandatory Occurrence Reports 

MTOM 

Maximum Take Off Mass 

No-Fly Zone 

An area where drone flights are restricted or prohibited. These zones are typically established around airports, government buildings, and sensitive infrastructure to ensure safety and security. Drone operators must be aware of and comply with no-fly zone regulations to avoid penalties and ensure the safety of others. 

Noise Signature 

The sound profile a drone creates during flight. This includes the pitch, volume, and frequency of the noise produced by the drone’s motors and rotors. Noise signatures are important considerations in drone design, especially for operations in populated or noise-sensitive areas. 

Nominal Range 

The maximum distance it can travel from the controller while maintaining effective communication and control. Factors affecting it include its transmission technology, environmental conditions, and any potential interference. Understanding a drone’s nominal range is crucial for planning flights and ensuring the drone does not go beyond its control limits. 

NOTAM (Notice to Airmen) 

A Notice to Airmen (NOTAM) is a notice given to warn aircraft or UAS pilots of any possible hazards or flight restrictions along a flight route or specific location. 

NAA 

National Aviation Authority 

NATS 

Formerly National Air Traffic Services and commonly referred to as NATS 

Obstacle Avoidance System 

The system used by drones to detect and navigate around objects in their flight path. This feature is essential for safe operation, especially in complex environments or when the drone is flying autonomously. It utilises sensors such as lidar, radar, sonar, or optical cameras to perceive obstacles and software algorithms to safely navigate around them. 

Octocopter 

A type of multirotor drone that has eight rotors. This configuration offers increased lifting capacity, stability, and redundancy, making octocopters suitable for professional applications, including aerial photography, surveillance, and cargo delivery. The additional rotors provide a safety margin; if one motor fails, the drone can still land safely. 

Optical Flow 

Technology used in navigation to determine the drone’s movement relative to the ground. By analysing the motion of patterns on the ground through a downward-facing camera, drones can maintain a stable hover without GPS, estimate their speed, and detect obstacles. Optical flow is particularly useful in indoor environments or areas where GPS is unreliable. 

Orthomosaic 

A detailed, accurate photo representation of an area, created by stitching together a series of individual photos taken from a drone. These images are corrected for geometric distortions, resulting in a uniform scale. Orthomosaics are used in surveying, mapping, and agricultural applications to provide a detailed overview of large areas. 

Photogrammetry 

The process of generating maps and 3D models from overlapping aerial images. It is used to create orthomosaics, digital surface models, and other spatial datasets. 

Pilot in Command (PIC) 

The individual responsible for the operation and safety of the drone during flight time. The PIC must ensure the drone is operated within legal and safety guidelines, making decisions about the flight based on weather, airspace restrictions, and the condition of the drone. Training is available for this. 

Pitch 

The angle of the drone’s forward and backward tilt. Controlling the pitch angle is essential as tilting forward or backward will cause the drone to move in that direction. Adjusting the pitch is one of the primary ways a pilot controls a drone’s movement during flight. 

Pix4D (The Brand) 

A Swiss company, founded in 2011, known for its advanced photogrammetry software technology. It specialises in transforming images taken from drones, phones, or other cameras into accurate 3D maps and models. Pix4D offers a range of software solutions tailored to different industries including mapping and industry-specific missions and has over 55,000 active users. 

Point Cloud 

A Point Cloud is a dataset consisting of spatial points that represent the surface of objects or terrain. Point clouds are generated by LiDAR or photogrammetry systems and form the basis of 3D modelling. 

Propeller Guard 

The protective cage or ring that surrounds the propellers of a drone. The main purpose of propeller guards is to prevent the propellers from meeting objects, animals, or people, thereby reducing the risk of damage or injury. Propeller guards are particularly recommended for new pilots and when flying in confined spaces or near obstacles. 

PfCO 

Permission for Commercial Operations 

PFAW 

Permission for Aerial Work 

PPE 

Personal Protective Equipment 

Quadcopter 

A type of drone characterized by its four rotors. This design offers stability, manoeuvrability, and vertical take-off and landing (VTOL) capabilities, making it one of the most popular configurations for consumer, hobbyist, and commercial drones. Quadcopters are used in a wide range of applications, from aerial photography to inspection services. 

Quick Release Propellers 

Propellers designed for easy and fast attachment or removal from the drone’s motors without the need for tools. This feature is particularly useful for rapid deployment and transportation, as well as for replacing damaged propellers in the field.     

Radio Frequency (RF) 

The electromagnetic wave frequencies that lie in the range extending from around 20 kHz to 300 GHz.  RF is crucial for communication between the drone and the remote controller. It enables the transmission of commands to the drone and the reception of data from it, including live video feeds. 

Range 

The maximum distance it can operate away from its controller while maintaining effective communication. This distance can vary significantly depending on the drone’s design, the technology used for communication, and environmental factors such as obstacles and interference. The range is a critical factor for operations requiring long-distance flight or remote areas exploration. 

Relative Accuracy 

Relative Accuracy is the measure of how precisely features align with one another within the same dataset. It is evaluated in mapping and volumetric analysis workflows. 

Remote ID 

The regulatory requirement that enables drones to broadcast identification and location information during flight. Remote ID may be integrated into the aircraft or provided through an external broadcast module. 

Return to Home (RTH) 

A safety feature found in many drones that automatically directs the drone to return to its take-off point or to a predefined home location. This feature can be manually activated by the pilot or automatically triggered by the drone in case of low battery, loss of signal, or other emergency situations, ensuring the drone’s safe recovery. 

Rotor 

A rotating part of the drone that includes the motor and the propeller. It plays a critical role in the drone’s ability to lift off, hover, and manoeuvre through the air. Drones can have multiple rotors, with configurations including quadcopters (four rotors), hexacopters (six rotors), and octocopters (eight rotors), each offering different levels of stability, payload capacity, and redundancy 

RTK (Real-Time Kinematic) 

RTK (Real-Time Kinematic) is a satellite navigation correction method that enhances the precision of position data derived from GNSS systems such as GPS. It uses a fixed base station or network correction service to transmit differential corrections to the drone’s receiver in real time. RTK enables centimetre-level positioning accuracy for mapping and surveying applications.   

RPAS 

Remotely Piloted Aircraft System 

RPQ 

Remote Pilot Qualification 

Surveying Drones 

Specialised UAVs equipped with sensors and cameras to capture data for mapping and surveying lands. They are used in various fields such as agriculture, construction, and geology to collect high-resolution images, conduct topographic surveys, and generate 3D models of the terrain. These drones offer a cost-effective, accurate, and efficient alternative to traditional surveying methods. 

SRG 

Safety Regulation Group 

SUA 

Small Unmanned Aircraft 

SUAS 

Small Unmanned Aircraft System 

Telemetry 

A two-way digital data stream between the UAV and a ground station that is used to communicate flight data and instructions to control the UAV. 

TFR (Temporary Flight Restriction) 

A temporary notice of restriction on a specific area of airspace because of the presence of government VIPs, special events, natural disasters, and other unusual occurrences. 

Thermal Imaging 

A technique used to visualise the heat present in objects, typically using a thermal camera mounted on a drone. This technology detects infrared radiation and creates images based on temperature differences. It is widely used in various applications, including search and rescue, surveillance, and agricultural inspection, to identify heat signatures not visible to the naked eye. 

Thrust 

The force generated by the drone’s motors and propellers that allows it to lift off the ground and manoeuvre in the air. The amount of thrust produced must exceed the weight of the drone for it to ascend. Adjusting the thrust affects the drone’s vertical speed and overall agility. 

UAS (2.4 GHz / 5.8 GHz Drone Frequency) 

Drone remote controllers typically switch between these frequencies to provide the strongest signal with the drone and camera system. The primary differences between the two frequencies are the distance and speed. The 2.4 GHz band provides a longer transmission range but at slower speeds. The 5 GHz band provides less range but transmits data at faster speeds. The combination of these two frequencies gives drones and remote controllers the power to transmit information quickly even at far distances. 

UAS (Unmanned Aircraft System) 

Unmanned aircraft, such as drones, controlled by an operator on the ground. The CAA uses the term UAS to reflect the fact that these systems also include other elements aside from the actual air vehicles. 

UAV 

Unmanned Aerial Vehicle 

Visual Line of Sight (VLOS) 

The requirement for drone operators to maintain direct visual contact with their aircraft during flight. This ensures that operators can monitor the drone’s position and surroundings to prevent collisions and ensure safety. 

VTOL (Vertical Take-Off and Landing) 

The term is used to describe drones capable of taking off, landing, and hovering in a vertical position. VTOL technology allows drones to operate in tight spaces or areas where conventional runway take-offs and landings are not possible.   

Waypoint 

A waypoint is a specific geographical location, defined by coordinates, that a drone is programmed to fly to as part of a predetermined flight path. Waypoints are used in mission planning to automate drone flights, allowing for complex flight patterns and precise aerial surveys or inspections. 

Yaw 

The rotation of a drone around its vertical axis. It is one of the primary flight control axes, alongside roll and pitch, that determines the drone’s orientation and direction. Adjusting the yaw allows the drone to turn left or right. This movement is crucial for navigating and stabilizing the drone during flight for precise positioning and manoeuvrability. 

Yield (Battery) 

The amount of operational flight time a drone can achieve on a single battery charge. It is a critical factor in mission planning, especially for applications requiring prolonged aerial surveillance, photography, or mapping. The yield is influenced by the battery’s capacity (measured in milliampere-hours, mAh), the drone’s weight, and the efficiency of its power systems. 

Yield Mapping 

An agricultural application of drones, involving the collection and analysis of data to map variability in crop yield across different sections of a farm. Drones equipped with multispectral or thermal cameras can gather detailed information on plant health, moisture levels, and other indicators that affect yield. This technology enables farmers to optimize their field operations, such as fertilisation and irrigation, based on precise spatial information, leading to improved crop management and productivity. 

Zoom Lens 

A Zoom Lens on a drone camera allows the operator to change the focal length and angle of view from a remote location, enabling the capture of images or video at varying levels of zoom without changing the drone’s position. High-quality zoom lenses can significantly enhance the flexibility and usefulness of drones in professional photography and videography, search and rescue, and many other applications.