T2CAS is a Traffic Avoidance and Alert System with a class A Terrain warning system, which utilizes a GPS based Ground Proximity Warning System that alerts the A/c of a dangerous proximity to ground closure.
The system has a digitalized information of topographical map of the Earth’s Terrain fed in its database and this is constantly compared with the A/c flying over the ground, calculated by the GPS based position to alert the A/c if it is dangerously close to a terrain or an obstacle.
The visual as well as Aural alert is presented on a EFIS system.
The system causes a Caution alert to be active Approximately four minute before the A/c enters the potential collision area.
The system calculates its protection envelope based on real flight conditions inputs from performance based conditions like A/c Weight, Outside Air Temperature and Engine conditions.