Sometimes for safety reasons it is necessary to cease flying operations on the hill and clear the air e.g. Helicopter evacuation of injured pilots. If this happens the procedure will be for the duty pilot to place a large white cross on the ground at the front of the hill. They will also sound an air horn three times in quick succession to try to draw the attention of those pilots who may not have visibility of the cross. On seeing the cross or hearing the horn all pilots are required to land as soon as it is safe to do so. If for some reason you have not seen the cross or heard the horn but you do see a helicopter approaching the area keep a safe distance away from the helicopter and land as soon as it is safe to do so. Remember the helicopter may land near to our usual landing area in which case you must choose a suitable area at a safe distance away from it to land