 The closure of Soesterberg Air Base resulted in a lot more helicopter movements at Gilze-Rijen Air Base, and in order to reduce traffic there it was decided to use Deelen more often as a training site.To facilitate this it was decided to resurface part of the runway and to create a slope for helicopters to practice sloped landings on.The increased importance of Deelen resulted in it once again receiving the designation of Air Base (Dutch