Insert aircraft on the Taxiway in front of the southern most hangers , set waypoints MOVE at the southern end of the runway next waypoint set at the northern most tip of the land spit with flyinheight 400 in the OnAct box and a further waypoint over the sea (in my case JOIN) when player reaches a position over the land mass to the east. In the meantime the aircraft (2) circle the end of the airbase ok.