EXTERNAL GPS ANTENNA AS GRP

"The high-precision AS GRP external GPS antenna quickly determines your location with an accuracy of 2.5 meters. It is a more accurate and faster-performing antenna than standard models.
Compatible with: APEX, SOLIX (with AS GPS NMEA adapter), HELIX 15, HELIX 12, HELIX 10, HELIX 9, HELIX 7 G2N/G3N, ONIX (with AS GPS NMEA adapter).
Antenna dimensions: diameter 8.255 cm, height 3.81 cm, cable length 609 cm.
Humminbird software version must be 6.300 or higher.
Note: For APEX, SOLIX, and ONIX fishfinders, an AS GPS NMEA cable must be purchased for connection.
Note: This GPS antenna does not work with InterLink."