Drone Terminology, Glossary & Lingo (2026): Complete A–Z Guide

Drone terminology spans FAA regulations, electronics, flight physics, camera systems, and brand-specific features. This glossary covers all of it — organized alphabetically with plain-English explanations.

A

ActiveTrack

DJI’s vision-based subject tracking system. The drone identifies and locks onto a moving subject using camera recognition, following without GPS input. ActiveTrack 5.0 (on DJI Air 3S, Mavic 4 Pro) uses AI prediction to anticipate subject movement.

AGL (Above Ground Level)

Altitude measured from the ground directly below the drone, not sea level. FAA altitude limits for drones (400 ft) are expressed in AGL.

AMA (Academy of Model Aeronautics)

The oldest model aviation organization in the US. FAA-recognized CBO (Community-Based Organization) for recreational drone pilots. AMA membership includes $2.5M liability coverage and access to AMA flying sites (FRIAs).

APAS (Advanced Pilot Assistance System)

DJI’s omnidirectional obstacle sensing and avoidance system. APAS 5.0 is the current generation used in the DJI Mini 4 Pro, Air 3S, and Mavic 4 Pro — it actively routes around obstacles rather than just stopping.

B

B4UFLY

Free FAA app that shows airspace conditions for any US location. Shows color-coded safety status and explains restrictions before you fly. Available for iOS and Android.

Brushless Motor

The motor type used in all quality consumer drones. More efficient, more powerful, and longer-lasting than brushed motors. Brushless motors on consumer drones can last thousands of flight hours if properly maintained.

BVLOS (Beyond Visual Line of Sight)

Flying a drone beyond the range where the pilot can see it unaided. Requires an FAA waiver under current regulations. BVLOS is the frontier for commercial drone operations (delivery, infrastructure inspection, agriculture) and is actively being regulated for broader access.

C

CBO (Community-Based Organization)

FAA-recognized organizations whose safety guidelines recreational pilots can follow instead of FAA rules directly. The AMA is the largest CBO. Flying under a CBO’s guidelines means following their specific rules (which must meet or exceed FAA minimums).

Cinematic Mode (CineSmooth)

A flight mode that limits maximum speed and dampens stick inputs for smoother, more controlled movement. Essential for shooting video where sudden movements ruin footage.

Compass Calibration

The process of resetting the drone’s onboard compass to the local magnetic field. Required when flying in a new location or near metal structures. An uncalibrated compass can cause erratic flying and flyaways.

D

D-Log / D-Log M

DJI’s flat color profile for video. Records a low-contrast, low-saturation image that preserves more dynamic range for post-processing. D-Log M (available on Mini 4 Pro, Air 3S, Mavic 4 Pro) is a reduced-dynamic-range version easier to grade. Required for professional-quality color work.

DNG

Adobe Digital Negative format — the RAW file format output by most DJI camera drones. Preserves all sensor data for maximum editing flexibility in Lightroom, Capture One, or similar software.

DroneZone

FAA’s online platform (faadronezone.faa.gov) for drone registration, LAANC authorization, and Part 107 certificate management.

E

ESC (Electronic Speed Controller)

The electronics component that receives flight controller commands and controls motor speed. Four ESCs manage four motors in a quadcopter. ESC quality affects flight smoothness and response.

F

FAA (Federal Aviation Administration)

The US government agency responsible for regulating all civil aviation, including drones. FAA rules apply to any drone flown in US national airspace.

FC (Flight Controller)

The onboard computer that reads sensors (gyroscope, accelerometer, GPS, barometer) and adjusts motor speeds to maintain stable flight. The FC is the most important component for flight quality and reliability.

Fly More Combo

DJI’s bundle package that includes the base drone plus extra batteries, charging hub, ND filters, and carrying bag at a discounted price vs. buying separately. Generally good value for pilots who will fly regularly.

FPV (First-Person View)

Flying by watching a live video feed from the drone’s camera through goggles or a screen, as if sitting in the cockpit. FPV drones are typically un-stabilized, highly agile racing/freestyle craft. Different from standard camera drone flying where the pilot maintains visual line of sight.

FRIA (FAA-Recognized Identification Area)

Fixed flying sites — typically AMA club flying fields — where Remote ID broadcasting is not required. FRIAs are the only locations where drones can be flown without Remote ID.

G

Gimbal

A motorized mount that keeps the camera level and stable during flight. 3-axis gimbals compensate for pitch, roll, and yaw movements. Gimbal quality determines how smooth the footage appears — cheap drones with single-axis gimbals produce noticeably inferior video.

GPS (Global Positioning System)

Satellite navigation used by drones for position hold (hovering without drifting), return to home, waypoint navigation, and altitude hold. Quality GPS reception (8+ satellites) is essential for reliable automatic flight features.

H

HDR Video (High Dynamic Range)

Video that captures a wider range of brightness levels than standard video, preserving detail in both highlights and shadows. DJI Mini 4 Pro and above support HDR video recording.

HLG (Hybrid Log Gamma)

An HDR video format that produces a broader dynamic range than standard profiles while still looking acceptable without grading. Useful for content that will be viewed on HDR displays without extensive color grading.

I

IMU (Inertial Measurement Unit)

The sensor package (accelerometer + gyroscope) that measures the drone’s orientation and movement. The IMU feeds data to the flight controller dozens of times per second to maintain stability.

L

LAANC (Low Altitude Authorization and Notification Capability)

FAA’s automated system for airspace authorization. Available in most DJI drone apps and in B4UFLY/AirMap. Processes authorization requests in seconds for controlled airspace. Replaces the old paper-form authorization process for most common airspace requests.

LiPo (Lithium Polymer Battery)

The battery technology used in all consumer drones. High energy density enables long flight times, but LiPo batteries require careful charging (never overcharge or overdischarge), storage at 50–60% charge, and should not be punctured or exposed to high temperatures — they can catch fire or explode when damaged.

M

Mavic

DJI’s flagship consumer/prosumer drone line. Current generation: Mavic 4 Pro (2025/2026). Previous generations: Mavic 3 Pro, Mavic Air 2S, Mavic 2 Pro. The Mavic line represents DJI’s best consumer-grade imaging platform.

Mode 2

The standard control mapping used by DJI and most consumer drone manufacturers. Left stick controls throttle (up/down) and yaw (rotation). Right stick controls pitch (forward/backward) and roll (left/right strafe). Almost all tutorials assume Mode 2.

N

ND Filter (Neutral Density Filter)

A camera filter that reduces the amount of light entering the lens without affecting color. Essential for video shooting — allows proper shutter speed (2x frame rate rule) in bright outdoor conditions without overexposure. Common strengths: ND4, ND8, ND16, ND64.

O

O3 / O4 (OcuSync 4)

DJI’s video transmission systems. O4 is the current generation providing up to 20km transmission range, very low latency, and strong signal in environments with interference. O3 (previous gen) provides 15km range. Both far exceed what recreational pilots practically need.

Obstacle Avoidance

Systems using stereo vision cameras, infrared, or LiDAR to detect and avoid obstacles in the drone’s flight path. Levels: front-only (basic), multi-directional (intermediate), omnidirectional (advanced). See also: APAS.

P

Part 107

The FAA regulation governing commercial drone operations. To operate a drone commercially (for payment), pilots must hold a Part 107 Remote Pilot Certificate — earned by passing a 60-question knowledge test ($175) at an FAA-approved testing center. Valid 24 months.

Payload

Any additional equipment carried by a drone beyond its standard camera: thermal cameras, multispectral sensors, survey equipment, delivery packages. Payload capacity is a key spec for commercial/industrial drones.

Propwash

Turbulence created by the drone’s own propellers disturbing the air it’s flying through. Most visible when descending quickly — the drone flies into its own disturbed air, causing instability. Avoid rapid descents, especially in calm conditions.

Q

Quadcopter

A drone with four rotors/motors in a cross configuration. The most common consumer drone design. Stability and control come from varying individual motor speeds rather than mechanical pitch changes (as in helicopters).

R

RAW (DNG)

An unprocessed image file format that preserves all data captured by the camera sensor. RAW files require editing software but provide maximum flexibility for color correction and dynamic range recovery. See DNG.

Remote ID

FAA-mandated system requiring drones to broadcast their location, altitude, speed, and takeoff point in real-time. Required for most drone flights in the US since 2023. Built into drones sold after 2023; older drones can add a broadcast module. The only exemption is flying within a FRIA.

RTH (Return to Home)

Automatic flight mode where the drone returns to its recorded takeoff location. Triggered manually (RTH button), when battery falls critically low, or when signal is lost. The drone ascends to a preset RTH altitude before returning — this altitude should be set higher than any obstacle in the flight area.

S

Sport Mode

A high-speed flight mode available on most consumer drones. Increases maximum speed and responsiveness but reduces or disables obstacle avoidance. Not recommended for beginners or flying near obstacles.

Sub-250g

Drones weighing under 250 grams (0.55 lbs). This weight class is significant because it exempts recreational pilots from FAA registration requirements in the US. DJI has engineered multiple product lines specifically to stay under this threshold: DJI Neo (135g), DJI Mini 4K (249g), DJI Mini 4 Pro (249g), DJI Flip (249g).

T

TFR (Temporary Flight Restriction)

Temporary airspace restrictions issued by the FAA around events (sporting events, concerts, wildfires, VIP movements). TFRs appear with little notice — always check B4UFLY on the day of your planned flight, not just when planning the trip.

Throttle

The control input that adjusts altitude — up for ascend, down for descend. In Mode 2, throttle is controlled by the left stick’s up-down axis.

TRUST (The Recreational UAS Safety Test)

The FAA-required safety test for all recreational drone pilots in the US. Free, pass-only (no failure), covers airspace rules, safety, and emergency procedures. Provided online by FAA-approved administrators (AMA, AUVSI, and others). You must carry proof of passing when flying.

U

UAV (Unmanned Aerial Vehicle)

The technical/regulatory term for a drone. The FAA typically uses UAS (Unmanned Aircraft System) which includes the drone, controller, and supporting software/communication. “Drone” and “UAV” are used interchangeably in consumer contexts.

UAS (Unmanned Aircraft System)

The complete system comprising an unmanned aircraft plus its controller, communication links, and any ground support elements. The term the FAA uses in regulations.

V

VLOS (Visual Line of Sight)

The requirement that the drone pilot maintain unaided visual contact with the drone at all times during flight. Required for both recreational and Part 107 commercial operations. Flying beyond visual range without a waiver is illegal. See also: BVLOS.

W

Waypoint Navigation

Pre-programmed flight paths where the drone autonomously flies to specified GPS coordinates in sequence, executing actions at each waypoint. Used for mapping, surveying, and repeatable film shots. Available on many DJI drones via DJI Fly’s Waypoints feature.

Y

Yaw

Rotation around the vertical axis — spinning the drone left or right while staying in place. Controlled by the left stick’s left-right axis in Mode 2. Used to pan the camera or change the drone’s heading.

Advanced Flight Technology Terms

Once you move beyond beginner drones, you will encounter a second layer of technical vocabulary that covers the electronics, software, and hardware that make modern drones possible. Understanding these terms helps you make better buying decisions and troubleshoot issues when they arise.

Electronic Speed Controller (ESC)

The ESC is the circuit board that controls motor speed in response to signals from the flight controller. Each motor has its own ESC. In consumer drones these are integrated into the main board, but in custom FPV builds they are often separate components. ESC quality affects throttle responsiveness, efficiency, and heat management. Higher-end ESCs support higher current ratings (measured in amps) and regenerative braking, which extends battery life slightly on aggressive maneuvers.

Flight Controller (FC)

The flight controller is the brain of the drone. It reads data from the IMU, GPS, barometer, and other sensors hundreds of times per second, then adjusts motor speeds to maintain stable flight. Consumer drones have proprietary flight controllers (DJI uses its own FC hardware and firmware). FPV builders typically run open-source firmware like Betaflight or Ardupilot, which can be tuned extensively for racing or freestyle performance.

PID Tuning

PID stands for Proportional, Integral, Derivative -- the three mathematical terms that control how a flight controller responds to disturbances. Well-tuned PIDs make a drone feel smooth and precise. Under-tuned PIDs cause oscillations or sluggish response. Consumer drones are factory-tuned from the manufacturer, but FPV pilots spend significant time adjusting PID values to suit their flying style. This is an advanced topic primarily relevant to FPV and racing drone enthusiasts.

Betaflight

Betaflight is the most popular open-source flight controller firmware for FPV racing and freestyle drones. It runs on a wide range of flight controller hardware and offers extensive tuning capabilities, blackbox data logging, and a large community of developers and users. If you are building or buying an FPV drone, Betaflight is likely running on the flight controller. ArduPilot and PX4 are alternatives more common in commercial and mapping drone applications.

BLDC Motor

Brushless DC motors are the standard motor type in almost all modern drones. They use permanent magnets and electronic commutation rather than physical brushes, which makes them more efficient, longer-lasting, and capable of higher RPM than brushed motors. Motor specifications include KV rating (RPM per volt), stator size (diameter x height), and current draw. Consumer drones ship with motors optimized for their prop and battery combination -- for FPV builds, motor selection is a major design decision.

LiPo Battery

Lithium Polymer batteries are the standard power source for drones. LiPo cells provide high energy density and the ability to discharge at high rates (measured in C rating). Key specifications: cell count (1S to 6S, where S = cells in series, each at 3.7V nominal), capacity (mAh), and discharge rate (C). Consumer drone batteries are proprietary units, but FPV pilots buy aftermarket LiPo packs. LiPo batteries require careful storage and charging -- a damaged LiPo can catch fire if punctured or overcharged.

Telemetry

Telemetry refers to real-time data transmitted from the drone to the pilot. This includes GPS position, altitude, battery voltage, signal strength, motor temperatures, and flight statistics. Consumer drones display telemetry in the controller app. Advanced systems allow telemetry logging for post-flight analysis. RC planes and long-range drones often use dedicated telemetry radios (915 MHz or 433 MHz) separate from the RC control link for redundancy.

Camera and Imaging Terminology

Drone camera quality is often the deciding factor in which drone to buy. These terms will help you understand what specifications actually mean for image quality and creative flexibility.

D-Log M / D-Log / D-Cinelike

Log color profiles are flat, low-contrast recording modes that preserve more dynamic range than standard video. D-Log M is DJI color profile optimized for drone shooting -- it captures a wide dynamic range but requires color grading in post-production to look good. D-Cinelike is a less extreme version available on some models. If you are shooting for professional delivery or plan to color grade your footage, log profiles give you more data to work with. For casual sharing directly to social media, normal color profiles are easier since they look good out of the drone.

Sensor Size

Sensor size is the single most important factor in drone image quality. Larger sensors capture more light, which improves dynamic range, reduces noise in low light, and enables shallower depth of field. Common sizes from smallest to largest: 1/4-inch (budget drones), 1/2-inch (mid-range), 1/1.3-inch (DJI Mini 4 Pro), 1-inch (DJI Air 3S), 4/3-inch (DJI Mavic 4 Pro). The jump from 1/2-inch to 1-inch is significant; the jump from 1-inch to 4/3-inch matters most in challenging light and commercial work.

FOV and Focal Length Equivalent

FOV stands for field of view -- the angle of the scene captured by the lens. Wider FOV means more sky and foreground in the frame, narrower FOV means more telephoto compression. Drone cameras typically state their lens as a 35mm equivalent focal length: 24mm is ultra-wide, 35mm is wide, 50mm is normal, 70mm is short telephoto. The DJI Mavic 4 Pro has a 24mm wide lens, 70mm mid lens, and 168mm telephoto lens, giving three very different perspectives from a single aircraft.

ND Filters (Neutral Density)

ND filters are like sunglasses for the drone camera. They reduce the amount of light entering the lens without affecting color, allowing you to use a slower shutter speed in bright conditions. The videography rule of thumb is the 180-degree shutter rule: shutter speed should be double your frame rate (so 1/60 for 30fps, 1/120 for 60fps). Without ND filters in bright sunlight, you would need to shoot at 1/2000 or higher, creating unnaturally sharp, jittery motion. ND4, ND8, ND16, and ND32 are the most commonly used strengths for outdoor drone filming.

ActiveTrack and Subject Tracking

ActiveTrack is DJI proprietary AI subject tracking technology. Once you tap on a subject in the DJI Fly app, the drone will keep that subject centered in the frame while flying automatically. ActiveTrack 360 (available on Mini 4 Pro and above) allows orbit-style tracking as well as simple follow mode. Similar technologies exist from other manufacturers under different names. Subject tracking quality varies significantly between drone models -- higher-end drones track faster subjects and maintain lock better in complex backgrounds.

Regulatory and Legal Terminology

Drone regulations are evolving rapidly worldwide. These terms appear frequently in official documentation and news coverage of drone rules.

Remote ID

Remote ID is a technology requirement that makes drones broadcast identifying information during flight, similar to an aircraft transponder. In the United States, the FAA requires Remote ID on all drones over 250g registered under Part 107 or recreational rules as of September 2023. The broadcast includes the drone location, operator location, altitude, speed, and a unique identifier. Some drones have Remote ID built in; others require an add-on Remote ID module. Remote ID enables authorities to identify drone operators in airspace incidents.

Part 107

Part 107 is the FAA regulation governing commercial drone operations in the United States. To fly commercially (any paid work including real estate photography, film, weddings), pilots must pass the FAA Remote Pilot Certificate knowledge test and follow Part 107 rules: fly below 400 feet AGL, within visual line of sight, during daylight, away from controlled airspace without authorization, and never over moving vehicles or people without a waiver. The Part 107 test covers airspace classes, weather, flight planning, and emergency procedures.

VLOS and BVLOS

VLOS stands for Visual Line of Sight -- the standard requirement that pilots must be able to see their drone with unaided eyes throughout the flight. BVLOS (Beyond Visual Line of Sight) refers to operations where the pilot cannot directly see the drone, relying on sensors, cameras, or observers. BVLOS operations require special FAA waivers and are primarily used for commercial applications like pipeline inspection, precision agriculture, and package delivery. Most hobbyist and commercial drone regulations worldwide require VLOS operations.

Controlled Airspace (Class B, C, D, E, G)

US airspace is divided into classes. Class B surrounds major airports like LAX and JFK -- no drone flight without authorization. Class C surrounds medium airports -- same. Class D surrounds smaller towered airports -- same. Class E is controlled airspace above 1,200 feet in most areas -- recreational drones flying below 400 feet are generally fine here. Class G is uncontrolled airspace -- the most permissive for drone flight. The FAA LAANC system and apps like AirMap and B4UFLY let pilots check airspace class and request automated authorization in seconds.

Quick Reference: Common Drone Acronyms

Acronym	Stands For	What It Means
UAV	Unmanned Aerial Vehicle	Technical/regulatory term for drone
UAS	Unmanned Aircraft System	Drone + controller + software ecosystem
FPV	First-Person View	Flying via goggles from drone perspective
IMU	Inertial Measurement Unit	Gyroscope and accelerometer sensors
ESC	Electronic Speed Controller	Controls motor speed per flight controller
RTH	Return to Home	Auto-fly back to takeoff point
LAANC	Low Altitude Authorization and Notification Capability	FAA automated airspace authorization system
AGL	Above Ground Level	Altitude measured from terrain below
MSL	Mean Sea Level	Altitude measured from sea level
GNSS	Global Navigation Satellite System	GPS + GLONASS + BeiDou combined

Bookmark this page as your drone vocabulary reference. As new drone technology emerges -- including autonomous delivery systems, AI collision avoidance, and cellular-connected drones -- new terminology will continue to develop. I update this guide as the vocabulary evolves.

Drone Safety and Operational Terms

Before flying any drone, knowing the safety terminology helps you understand checklists, manufacturer warnings, and community guidelines. These terms appear regularly in pre-flight procedures and accident reports.

Geo-fencing

Geo-fencing is a software-enforced restriction that prevents drones from flying in certain areas. DJI drones have built-in geo-fencing that uses GPS coordinates to identify airports, national parks, stadiums, and sensitive government facilities. When you approach a restricted zone, the drone either stops and hovers or refuses to take off. DJI offers an unlocking system for licensed commercial pilots who have received proper authorization to fly in restricted areas. Some other manufacturers use less restrictive geo-fencing systems, and a few budget drones have no geo-fencing at all.

Failsafe

A failsafe is an automatic response the drone takes when something goes wrong: losing RC signal, critical low battery, or GPS error. Common failsafe behaviors include Return to Home (RTH), hover in place, land immediately, or continue the current mission. Most consumer drones default to RTH when the RC signal drops for more than a few seconds, which is why setting a correct home point before every flight matters. If you take off and immediately fly to a new GPS location, RTH will send the drone back to where it took off -- potentially over water or obstacles.

Compass Calibration

The compass (magnetometer) tells the drone which direction is north, which is essential for GPS-stabilized flight. Calibration is required when flying in a new location or after the compass has been near strong magnetic fields (cars, buildings with rebar, power lines). The calibration process typically involves rotating the drone in specific patterns until the app confirms calibration is complete. Flying with poor compass calibration causes toilet-bowling (circular drift), unexpected heading changes, or loss of position hold. This is one of the most important pre-flight checks.

Propwash

Propwash is turbulence caused by the drone flying through its own rotor wash. It commonly occurs when descending rapidly or during quick direction changes, causing momentary instability or oscillation in the footage. Consumer drones use advanced algorithms to minimize propwash effects, but it is impossible to eliminate entirely. In FPV flying, propwash management is a key piloting skill. In photography drones, avoiding rapid descents and using Cine mode (which limits maximum speed and acceleration) reduces propwash artifacts in footage.

Attitude Mode vs. GPS Mode vs. ATTI Mode

Most drones fly in GPS mode by default: GPS and visual positioning systems keep the drone locked in place even when you release the sticks. Attitude mode (ATTI mode) disables GPS position hold -- the drone will drift with wind when you release the sticks and requires constant correction inputs from the pilot. ATTI mode is used intentionally by experienced pilots for smoother cinematic shots or as a response to GPS signal loss. Never switch to ATTI mode unless you are trained to fly without GPS, as it requires significantly more skill to maintain position and altitude.

Visual Positioning System (VPS)

VPS uses downward-facing cameras and optical sensors to measure position relative to the ground when GPS is unavailable or unreliable. It works best over textured surfaces (grass, gravel, pavement patterns) and within a few meters of the ground. In featureless areas like calm water, snow, or bare concrete, VPS accuracy drops significantly. DJI drones switch to VPS automatically when GPS satellite count is low or signal quality is poor. VPS is the reason modern drones can hover stably indoors where GPS signals do not penetrate.