@itscaptainzee: How Pilots Enter the Gripen vs F-35 . The Saab Gripen uses a sideways-opening canopy, allowing pilots to climb in from a small platform or external ladder. The design also acts as a windbreak for the pilot and ground crew while eliminating the extra weight of a built-in ladder system. The F-35 Lightning II takes a different approach, with its canopy opening upward and forward while pilots board using a built-in ladder integrated into the aircraft itself.