In the Netherlands there are currently 8 different para centers , each with one or more drop zones .
Although nowadays they are used mainly for square parachutes, which enables many parachute centers to have smaller DZs. For some centers who have larger DZs it is still possible to jump round parachutes. Paracentrum Teuge is one such training center.
A fixed drop zone ( DZ ) or para club operates one or more aircraft that takes groups of skydivers up for a fee . On a smaller drop zones small aircraft such as a Cessna C - 172 or C -182 are used . On the larger drop zones bigger aircraft are used with a higher capacity , such as the Cessna 208 , de Havilland Twin Otter, DHC6 or Short Skyvan .
Usually our jumpers jump from aircraft however occasionally we also from air balloons or helicopters .
An average jump altitude is a jump from a aircraft at about 3,800 meters ( 12,500 ft) , a free fall of about one minute before activating a parachute at about 800 meters ( 2500-3000 feet) . The remainder of the flight takes approximately 5 minutes. When the parachute opens , the parachutist can influence the direction and speed through the steering lines which are attached to the back of the parachute and can try to make a soft landing. All modern sport parachutes are self-inflating " ram-air " wings that are similar in the control of speed and direction with paragliders.
Paragliders have much greater lift and range, but parachutes are designed to absorb stress at terminal velocity . This in turn forces the opening of the parachute.