SurfaceWatch is a runway monitoring technology that provides indications and alerts designed to help prevent pilots from taking off or landing on the wrong runway, a runway that is too short, or a taxiway. During preflight, pilots can enter the takeoff/landing distance performance data, prompting a brief “runway too short” aural annunciation and a visual message on the primary flight display (PFD) if the aircraft is aligned to take off or land on a runway that is too short. SurfaceWatch will also display the remaining runway distance information on the PFD during the takeoff roll and landing rollout. On approach, the system will provide a “check runway” annunciation if the aircraft is aligned with the wrong runway.