I have fsv24 and csh84 color sacanning sonars. To connect them a sat compass nmea 0183 data, I bought a scx-21 sat compass.I never get a true gps compass data for these sonars. I m changing sat compass port settings nmea 0183 version, talker and b.rate but I cant suitable data and I cant see the gps values on sonars. I tried sst comp. Data on pc tz software I can get the datas successful. Pls help me about this trouble. Thanks for all.