Which GPS systems provide the GPS Steering signal required for GPS steering?
A – Most panel GPS that are IFR certified Garmin 250/300XL, Garmin GNC 430/530, 480, Apollo GX50/55/60/65 and, King KLN 90/90B, Sierra Flight Systems, Chelton Flight System, and Grand Rapids EFIS. In most cases the signal used for GPS Steering is the ARINC 429 Roll Steering signal, however the Apollo GX50/55/60/65 units provide GPS Steering over the RS-232 line.