Turbo Beholder - 2013-07-28

Which waypoints the ship must use should be told to it by the dock-owning unit on Landing Request, who would also deny them to everyone else as long as clearance is active. To avoid collisions.
I'd even have 2 flags for waypoints: APPROACH and DEPART, for better traffic control, and use the partially implemented undock sequence to send an undocking ship toward the following DEPART node(s) before it does anything else.