with a single type. While the old TFR had an MTBF around 20 hours, MBTF for the AN/APQ-171 is better than 50 hrs. AN/APQ-172 Improved AN/APQ-162 TFR for RF-4C. AN/APQ-174 for the MH-60K and MH-47E helicopters AN/APQ-186 Improved AN/APQ-174 by Raytheon for CV-22 AN/APN-237 Ku band terrain-following radar by Texas Instruments part of AN/AAQ-13 References Aircraft radars Military radars of the United States Radars of the United States Air Force