Abstract: A terrain advisory system for an aircraft is disclosed. The terrain advisory system comprises a processing unit, a display unit coupled to the processing unit where the display unit displays a map, and a database coupled to the processing unit. The system also comprises a sensor system coupled to the processing unit and a terrain awareness and warning system (TAWS) coupled to the processing unit. The TAWS generates cautions and alerts. The processing unit comprises a program that generates a terrain advisory envelope extending beyond the distance and lateral envelope within which the TAWS provides cautions and alerts. The terrain advisory envelope is distinguished from TAWS cautions and alerts with a graphical appearance that differs from the graphical appearance of TAWS cautions and alerts.