Humminbird AS GR50 GPS 50-Channel GPS/WAAS receiver can be used in lower signal areas (compared to a AS GR16) and still maintain a position fix. It also has a faster Time to First Fix (TTFF). The receiver's dimensions are: 3.25" diameter, 1.5" high and comes with 20 feet of cable and has a 1"-14 thread count stem mountable with optional antenna stem (antenna stem not included).
