Tunnels are a circular space of varying diameter made with transparent vertical walls in which a strong vertical airflow is produced by electric motors.
The general public can watch the skydivers evolve inside the tunnel, which brings the added value of sharing the competition with the spectators.
Initially used by the military, the first tunnel reserved for sport or leisure was opened in Las Vegas in 1982.
Today there are more than 100 mobile or permanent wind tunnels throughout the world and more than a dozen alone opened in the first quarter of 2016.
The development of Indoor Skydiving has accelerated throughout the world in the last few years with wind tunnels usually being set up in outlying suburbs.
Regular participants or outdoor sky-divers usually have their own special outfit but for occasional or novice participants they can borrow or rent an outfit on site. Thanks to the qualified technical staff and secure envi-ronment, progression in the sport is usually quite rapid especially amongst the younger participants who are quickly able to fly and per-form various manoeuvres.
The ease with which this progression is possible together with the friendly atmosphere amongst beginners and top level athletes alike makes this sport attractive and explains why it has experienced such a rapid development over the past decade.
IN FEBRUARY 2018 THERE WERE 139 TUNNELS TROUGHOUT THE WORLD, 30 UNDER CONSTRUCTION AND 39 ANNONCED