Humminbird External GPS Heading Sensor

Precision NMEAO183 GPS/ WAAS Receiver with Heading Sensor provides fast position fixes accurate within 2.5 meters. Provides more accurate position fixes than the industry standard GPS. Dimensions are 3-1/4" diameter 1-1 1/2' high and comes with 20' cable and has 1" -14" thread count stem mountable with an optional antenna stem ( atenna stem not included. This receiver software 6.570 or higher in the compatible Humminbird products. Compatible with: Apex Series - AS GPS cable required to connect external GPS module. Compatible with SOLIX Series AS GPS NMEA cable required to connect external GPS module. Compatible with HELIX 15, 12, 10, 9, 8, 7 G2N/ G3N/G4N. THIS GPS receiver WILL NOT work with Interlink.