What does DFTI mean in UNCLASSIFIED

Distance From Touchdown Indicator (DFTI) is an indicator used by pilots to measure how far away they are from their touchdown point on a runway. It can be used in both manual and automated flight scenarios.

DFTI uses ground speed sensors and other devices to measure the aircraft's position in relation to the runway threshold. The system then displays a distance-to-go figure, which shows how many meters or feet remain until the aircraft reaches its touchdown point.

There are two main types of DFTIs available — analog and digital. Analog systems use moving parts, such as dials or levers, to display the distance-to-go data, while digital systems rely on LED displays or LCD screens.

By using a DFTI, pilots can accurately estimate when they will reach their touchdown point and make adjustments accordingly. Additionally, together with other instruments like instrument landing systems (ILS), it allows for better control over the approach path as well as improved situational awareness.

Yes, one limitation with using a DFTI is that if there are strong winds during the approach phase of flight then this could cause inaccurate readings due to turbulence experienced by the aircraft. Additionally, some airports may not have sufficient navigation aids installed which could affect its accuracy too.