* The HHGPS cable is 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 unit. * Supported devices may include DSC VHF, Heading Sensors, GPS, and AIS devices. Your Humminbird control head manual should be referenced to confirm which devices are supported. * Includes: NMEA connection cable, Y-cable and detailed instructions. * This HHGPS cable requires a RS-232 or NMEA 0183 cable from the device’s manufacture to complete the connection to the Humminbird control head. * This cable should not be used on an ONIX or ION unit. Instead an AS GPS NMEA or AS DUAL NMEA cable should be used.