Altiport

An altiport is an aerodrome for small airplanes and helicopters, situated on or within mountainous terrain. The term is generally confined to describing small mountainous aerodromes in the French Alps. Altiports are generally characterised by having a pronounced upward sloping runway, which aids aircraft deceleration when landing and assists acceleration during takeoff. In order for an altiport to function in this manner, aircraft must practice reciprocal landings and takeoffs.