URETUser Request Evaluation Tool (Air Traffic Control)
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As Bilimoria (2001) noted, changes in pilot intent might in some cases not be received in time or not be received at all by the computer system from which URET receives the information required by its conflict prediction algorithm.
In contrast to the currently used STCA, which is based on only current trajectory, the detection aid used in this study had access to information based on the flight plans and therefore was, in its functionality, similar to advanced aids such as URET.
However, inaccuracies in a conflict detection aid such as URET are more likely to be short term.
Hence, controllers love URET because it eliminates the time previously consumed by posting, updating, scanning for conflicts, re-sequencing for time revisions, marking the strip for radar contact, radar contact lost, and a final mark when the aircraft was changed to another frequency and then the physical removal of the strip from the board.
The URET computer alerts the controller if two or more aircraft are projected to lose separation or if an aircraft's route will enter an active special-use airspace.
URET has a large memory and by tricking it, can give you direct a destination not stored in HOST by adding any fix outside the center's area near the aircraft's route of flight.