Humminbird AS HHGPS Handheld GPS Connection Kit 137-7000301
Connection Kit connects your Handheld GPS Receiver to your Fishing System control head via an additional NMEA data cable (data cable must be purchased from your Handheld GPS Receiver manufacturer). Used to connect a RS-232 and NMEA 0183 devices to the GPS/NMEA port on a 300, 500, 600, 700, 800, 900, 1100, or HELIX Series.
300, 500, 600, HELIX 5, and HELIX 7 control heads do not supply power therefore the connected device must be externally powered.