Garmin (NYSE: GRMN) announced it has received Federal Aviation Administration (FAA) Supplemental Type Certification (STC) for the GFC™ 600 digital autopilot in Piper PA-31-350 Navajo Chieftain aircraft. Additionally, Smart Rudder Bias1 is now certified for PA-31-350 aircraft equipped with the GFC 600 autopilot, further growing the list of compatible aircraft to offer this safety-enhancing technology.