Controlled Flight Into Terrain (CFIT)

is one of the leading cause of fatal accidents and has lead to the envelopment of various systems, some mandated, to help pilots be Aware and Warn them of a situations, which if left uncorrected, could result in CFIT.  Early on, Radar Altimeter Systems (RAD/ALT) became common and were able to measure the distance between the aircraft and the terrain directly below it. The early Ground Proximity Warning System (GPWS), mandated on Air Transport aircraft for many years, have given way to Enhanced Ground Proximity Warning Systems otherwise commonly know as Terrain Awareness and Warning Systems (EGPWS/TAWS) use GPS positioning and detailed Terrain Data Base information along with Air Data, RAD/ALT, and various other inputs, to provide Annunciated, Audible and Pictorial Situation Warnings of Terrain Conflicts.  Class B TAWS is required for Part 91 aircraft as well as Class A for Part 125/135, Air Transport, and now Heli TAWS specifically for rotorcraft operators. (See Rotorcraft TAWS).

APG Offers systems from the following Manufacturers, Click on the links below for Product details

Bendix/King: KGP-560, MK-VI, MK-VIII, MK-V, MK-VII,  KRA-405B,

FreeFlight Systems: TRA3000/TRI40, RA-4500/RAD40,

Garmin: GPS-500W TAWS, GNS-530W TAWS, GNS-530AW TAWS,  GTN-625, GTN-635, GTN-650, GTN-725, GTN-750,

All of Garmin's GTN Series Navigators are Class B TAWS Capable through an Enablement Un-Lock Card either at time of purchase or as an "In the Field" upgrade

Sandel: ST3400 CL B, ST3400 CL A,