Definition
FINAL MONITOR AID
A high resolution color display that is equipped with the controller alert system hardware/software used to monitor the no transgression zone (NTZ) during simultaneous parallel approach operations. The display includes alert algorithms providing the target predictors, a color change alert when a target penetrates or is predicted to penetrate the no transgression zone (NTZ), synthesized voice alerts, and digital mapping.
Source: FAA Pilot/Controller Glossary (verbatim from the Federal Aviation Regulations).