Terms, abbreviations and pilot slang
Paragliding glossary
From your first thermal to flight computers. Explore essential terms, abbreviations and pilot slang, with related concepts and further reading.
Showing 100 of 100 terms
Equipment
20Brakes
The control lines and handles acting on the wing’s trailing edge.
Carabiner
A connector commonly used to attach the paraglider’s risers to the harness.
Cockpit
An instrument platform or holder positioned in front of the pilot.
Concertina bag
A packing bag in which the wing is folded so the cells stack neatly on top of each other.
EN certification
The classification of paraglider wings into classes A to D based on flight-test behaviour under the European EN standard.
Harness
The equipment that supports the pilot beneath the wing.
Helmet
Protection for the pilot’s head.
Leading edge
The front edge of the wing, where the airflow meets the canopy and the cell openings sit.
Lines
The cords connecting the canopy to the risers, with suspension lines carrying the load.
Open harness
A harness without a leg cover, in which the pilot sits with legs free.
Pod harness
A harness with a leg cover that encloses the pilot's legs in flight.
Reserve parachute
A separate emergency parachute carried for use during flight.
Reversible harness
A harness that turns inside out to become a rucksack for the whole kit.
Risers
The straps between the paraglider’s lines and the harness attachment points.
Speedbar
A foot-operated system that changes the wing’s suspension geometry to increase airspeed.
Trailing edge
The rear edge of the wing, where the brake lines are attached.
Two-liner
A wing whose suspension lines join into only two main rows, A and B.
Wind streamer
A simple ribbon or strip of fabric that mainly shows wind direction.
Windsock
A fabric tube on a pole that shows wind direction and gives a rough idea of its strength.
Wing
The lifting part of a paraglider, connected to the pilot by lines and risers.
Air and weather
28Blue hole
An area without cumulus in an otherwise cumulus-filled sky, where thermals are weak or absent.
Cloud street
Cumulus clouds lined up by the wind into long bands.
Cloud suck
Strengthening lift just below the base of a cloud.
Cloudbase
The lower boundary of a cloud.
Cumulus
A heap-shaped convective cloud with distinct edges.
Dust devil
A narrow, rapidly rotating column of rising air near the ground, made visible by dust.
Gust front
Strong, gusty wind flowing out of a thunderstorm and spreading across the ground.
Gusts
Brief increases in wind speed above the average.
Inversion
A layer in which temperature rises with height instead of falling, so thermals stall in it.
Lee
The side of a slope or obstacle sheltered from the incoming wind.
Lift
Rising air that can help a glider maintain or gain height.
Overcast
Cloud cover that blankets the whole sky and shuts out the sun.
Ridge lift
Rising air produced when wind is deflected upwards by a slope.
Rotor
A region of rotating airflow that can form on the lee side of terrain.
Sink
Air moving downwards.
Stable air
Air whose layering stops warm air from rising far.
Synoptic wind
The large-scale wind set by pressure systems, as shown in the forecast.
Thermal
A rising current driven by differences in air temperature and density.
Thermal bubble
A detached parcel of warm air that breaks away from the ground and rises on its own.
Thermal ceiling
The height to which rising warm air climbs before thermals die out.
Thermal core
The part of a thermal where the air rises most strongly.
Thermal drift
The displacement of a thermal by the wind, so it rises at a slant downwind instead of straight up.
Turbulence
Irregular, swirling airflow with changes in speed and direction.
Valley wind
A thermally driven daytime flow that draws air up the valleys towards the ridges in big mountains.
Variable wind
Light wind that keeps changing direction.
Venturi effect
The acceleration of wind through a constriction in the terrain or over the top of a hill.
Wind shear
A sudden change in wind direction or speed with height.
Windward
The side of a slope or obstacle facing the incoming wind.
Flying
29Airspace
Defined parts of the sky in which particular rules of operation apply.
Airspeed
The speed of the glider relative to the surrounding air.
Big ears
A descent technique in which the wingtips are folded in to reduce the wing’s area.
Centring
Placing your circles over the strongest part of a thermal.
Cobra launch
A launch technique for strong wind in which the wing is raised from the side.
Collapse
A deformation in which part of the inflated canopy folds or loses its flying shape.
Cravat
A situation where part of the canopy, usually the wingtip, gets caught in the lines.
Forward launch
A launch in which the pilot has their back to the wing and runs in the direction of flight.
Frontal collapse
A collapse of the leading edge across the whole span of the wing.
Glide ratio
Horizontal distance travelled per unit of height lost in a glide.
Groundhandling
Practising control of the wing while staying on the ground.
Groundspeed
The speed at which the pilot moves over the ground.
Landing
The final part of a flight in which the pilot returns to the ground.
Landing field
An area chosen or designated for landing.
Launch site
The place pilots take off from, usually on a hill or slope.
Reverse launch
A launch in which the pilot faces the wing while inflating it.
Ridge soaring
Soaring in air that wind pushes upwards along a slope.
Sink rate
The speed at which a glider descends through still air.
SIV course
A course in which pilots practise flight incidents under instructor supervision, usually over water.
Soaring
Using rising air to maintain or gain height without engine power.
Spin
A state in which one half of the wing is stalled and flies backwards while the other flies forwards.
Spiral dive
A rapid descent in a tightening turn with high G-forces.
Stall
A state in which excessive angle of attack separates the airflow and disrupts the wing’s normal lift.
Takeoff
The transition from the ground into flight.
Thermalling
Circling in a thermal to gain height.
Top landing
Landing up at or near launch instead of in the landing field below.
Tree landing
An unintended landing in the crown of a tree.
Twist
A situation where the pilot rotates relative to the wing and the risers twist above them.
Wingover
A series of linked alternating turns with gradually increasing bank.
Instruments
10Altimeter
An instrument or function showing height relative to a reference.
Bluetooth
A short-range wireless link a vario uses to send data to a phone or another instrument.
FANET
A radio network for exchanging data between compatible free-flight devices.
FLARM
Technology for electronic conspicuity and collision warnings between compatibly equipped aircraft.
GPS
A satellite system providing positioning, navigation and timing.
IGC
A flight-log file format named after the International Gliding Commission. In practice it is a text file with the .igc extension.
Live tracking
Sharing position updates with remote viewers during a flight.
Tracklog
A time-ordered series of positions recorded during a flight.
Variometer
An instrument indicating the pilot’s rate of climb or descent.
Waypoint
A stored location with coordinates used for navigation.
Terrain
3Flatlands
Terrain without significant high ground, as opposed to mountains.
Ridge
An elongated stretch of high ground whose crest usually forms a watershed.
Thermal trigger
A place where warmed air breaks away from the ground and starts to rise, such as a forest edge, field boundary or terrain break.
Cross-country and competitions
10Average speed
The course distance divided by the total time taken to fly it.
Cross-country
A flight along a route beyond the immediate area of the launch site.
FAI triangle
A closed triangular cross-country flight whose shortest leg must not be too short relative to the total distance.
Goal
The predetermined end of a route, defined in competitions by a finish line or cylinder.
Hike & fly
Combining hiking on foot with flying, either as a recreational outing or as a race format.
Out-and-return
A cross-country flight to a single turnpoint and back to the starting point.
Retrieve
Getting a pilot back after landing away from launch, usually by car.
Task
The course set by the organisers for a given competition day.
Turnpoint
A point where a route or task turns onto its next leg.
Vol-biv
A multi-day trip covered by flying and walking, with the pilot carrying overnight kit.