The AT10 converts data on NMEA0183 format to SimNet/ NMEA2000 format and vice versa. AT10 is powered from the SimNet bus or from the NMEA2000 bus via an adaptor cable. AT10 is a universal converter as compared to AT15 which is a converter for IS15 only. None of them should be used to replace the other. Consult your Simrad dealer about information. Connect AT10 as per instructions on the other side and note the table below about NMEA0183 sentences supported by AT10. Note: The AT10 complies with NMEA0183 version 3.01.