Garmin announced it has received Federal Aviation Administration (FAA) Supplemental Type Certificate (STC) approval for the GFC 600 digital autopilot in Cessna 441 aircraft. The GFC 600 digital autopilot designed for high performance piston single and twin-engine aircraft, and also provides an advanced autopilot solution for both jet and turbine aircraft that have a wide range of speed and performance characteristics.The GFC 600 certification for the Cessna 441 provides owners an autopilot upgrade that incorporates solid-state attitude with robust self-monitoring capabilities to provide superior autopilot performance, greater reliability and safety benefits that are similar to the popular GFC 700 autopilot, in addition to traditional autopilot capabilities such as altitude hold, vertical speed and heading modes, the GFC 600 also includes altitude preselect, VNAV, Level Mode, underspeed and overspeed protection and more. Pilots can also select, couple and fly various instrument approaches, including GPS, ILS, VOR, LOC and back course approaches when paired with a compatible GPS navigator.Environmentally hardened autopilot servos designed for harsh operating conditions contain brushless DC motors offering improved performance and reducing maintenance requirements when compared to decades-old servo designs on the market today. Standard mark-width (6.25-inch) design of the GFC 600 mode controller allows for routine installation into the aircraft's avionics stack.As a standard feature, pilots receive Garmin Electronic Stability and Protection (ESP) with the GFC 600 digital autopilot, which works to assist the pilot in maintaning the aircraft in a stable flight condition. ESP functions independently of the autopilot and works in the background to help pilots avoid inadvertent flight attitudes or bank angles and provide airspeed protection while the pilot is hand-flying the aircraft.