AN/APQ-174

The AN/APQ-174 is a multi-mode, Ku band radar designed and manufactured by Raytheon. Developed in the late 1980s from the AN/APQ-168, the AN/APQ-174 is used on the US Army AH-60 Apache, CH-47 Chinook, and other military helicopters. The radar can be used for a variety of missions, which include combat search and rescue and special forces insertion and extraction. The AN/APQ-174 provides terrain following and terrain avoidance for a wide variety of military aircraft. It allows safe flight down to a 100-ft set clearance at night, in adverse weather, and in high-threat environments, lowering the probability of detection by enemy forces and increases mission success through terrain masking and minimizing time spent in threat range. The modes of the AN/APQ-174 include ground mapping, air-to-ground ranging, terrain following, weather detection, terrain avoidance, cross scan modes (TF/TA, TF/GM, TF/WX, TF/BCN), beacon interrogation, and low power/low velocity.