Aviation Terminology & Basics

Before you talk to an aircraft, you must speak the language of aviation. If you are new to ATC, study these terms carefully. They will be used throughout the entire guide.

Flight Rules & Flight Plans

• VFR (Visual Flight Rules): Flying by looking outside. VFR pilots do not need a strict instrument route and are responsible for seeing and avoiding other aircraft. They must stay clear of clouds.
• IFR (Instrument Flight Rules): Flying by instruments and ATC directions. IFR pilots can fly through clouds and rely entirely on ATC to maintain safe separation from other IFR aircraft.
• FLP (Flight Plan): A document submitted by a pilot containing their aircraft type, speed, requested route, and destination.

Airport & Ground Terms

• Active Runway: The runway currently used for takeoffs and landings, usually determined by wind direction (aircraft take off and land into the wind).
• Taxiway: Marked paved paths used by aircraft to move between parking ramps/gates and the runways (named using letters like Alpha, Bravo, Charlie).
• Hold Short Line: Solid and dashed yellow lines painted on taxiways just before they meet a runway. Aircraft must stop here and wait for explicit permission to cross or enter the runway.
• Runway Incursion: An unauthorized aircraft, vehicle, or person on an active runway. This is the most dangerous mistake a ground or tower controller can make.
• LUAW (Line Up and Wait): An instruction allowing an aircraft to taxi onto the active runway and line up, but NOT take off yet. Used to prepare for departure.
• Progressive Taxi: Step-by-step taxi instructions given to a pilot who is unfamiliar with the airport layout (e.g., "turn left next taxiway, then stop").

Routes & Airspace

• SID (Standard Instrument Departure): A pre-planned instrument flight route that safely guides IFR departures away from the airport and surrounding terrain into the en-route high-altitude airspace.
• STAR (Standard Terminal Arrival Route): A pre-planned instrument flight route that transitions arrivals from high-altitude airspace down to the airport area.
• TMA / Terminal Airspace: The controlled airspace surrounding a busy airport where arrivals are sequenced and departures are climbed.
• Fix / Waypoint: A specific geographical coordinate used by aircraft for navigation.
• Squawk / Transponder: A four-digit code (e.g., 4321) assigned to an aircraft. The aircraft's onboard transponder broadcasts this code, allowing the controller's radar screen to match the radar target to the correct callsign.

Flight Maneuvers & Systems

• ILS (Instrument Landing System): A highly precise radio beam system projecting from the runway. It guides IFR arrivals both horizontally (Localizer) and vertically (Glide Slope) straight to the runway centerline.
• Go-Around: A safety maneuver where an arriving aircraft aborts its landing approach and climbs back out to try again.
• VFR Circuit / Pattern: A standardized rectangular flight path flown around an airport by VFR aircraft practicing landings (consisting of Upwind, Crosswind, Downwind, Base, and Final legs).
• Wake Turbulence: Powerful, invisible spinning air vortices created behind a large/heavy aircraft's wings. These vortices can easily flip over smaller aircraft trailing too closely.
• Vector: A compass heading assigned by a radar controller to guide an aircraft's flight path (e.g., "Fly heading 270").