|Object Type:||Signal/Data Processor|
|Object Name:||Computer Unit|
|Division:||Airborne Display [ADD]|
|Year of Manufacture:||circa 1994|
|Location:||Main Object Store|
GOCAT Unit Assy (ARINC404)
Mod Record 1, 2
A. K. Fans Ltd.
Supply. 115V Y3 Ph-400Hz
A typical Ground Proximity Warning System uses radio altimeter information from 50 to 2,450 feet, with the barometric descent rate derived from an air data sensor. However,
most current GPWS systems only operate effectively and reliably over terrain that is relatively flat or that has a constant gradient. Over more hilly areas, there is a tendency for many systems 'to produce nuisance warnings or, conversely, not to generate a warning early enough for effective action to be taken. GEC Avionics has developed a Ground and Obstacle ColliSion Avoidance Technique (GOCAT), using a digital map of terrain contours and obstacles that are stored in an onboard database. Techniques already developed for military use allow very rapid access to the database, from which aircraft position, height of terrain, and obstacles along the flight path are determined and passed to the pilot and aircraft subsystems.