Here's a quick video about how aircraft move in That Others May Live. This information is also available on page 5 of the rulebook. To be clear, Fast Movers on their Enter side are moved back to the Orbit Box during the Adjust Markers segment of the turn. Fast Movers on their Exit side are removed from the map and returned to the Fast Mover Pool. All other aircraft remain on the map from turn to turn throughout the game.