Definition
A runway, taxiway, or ramp surface composed of small loose stones rather than asphalt, concrete, or turf. Gravel surfaces are reported in NOTAMs and airport listings because they affect aircraft handling, propeller and airframe wear, and braking performance.
Plain English
The runway or taxiway is made of small loose stones instead of a paved surface.
Context Anchor
Seen in NOTAMs, airport information, and surface descriptions for runways, taxi areas, or parking areas.
Derivation
Gravel comes from an old French word meaning small stones or coarse sand. That origin helps because the aviation meaning is still literal: the aircraft is operating on a small-stone surface.
Why Pilots Care
Gravel surfaces affect aircraft performance, braking distances, propeller clearance, and tire wear, requiring adjusted landing and takeoff techniques.
Grounding Statement
Picture the tires rolling over compacted small stones instead of smooth asphalt.
Intuition Check
Do not read GRVL as an equipment code or airport service. In this context, it means the surface material is gravel.
Example Sentence 1
The NOTAM listed the runway surface as GRVL, so the pilot planned a soft-field takeoff to reduce stone damage to the propeller.
Example Sentence 2
Before operating on the GRVL taxiway, the pilot checked tire pressures and propeller clearance.