You reset the SSC200 to transmit the factory default NMEA 0183 messages using Maretron's DSM200 or DSM250 display in the following way. Enter menu mode, scroll to "Configuration?" and press enter. Scroll to "Device Configuration?" and press enter. Scroll to the row containing the SSC200 and press enter. Scroll to "NMEA 0183 Settings..." and press enter. Scroll to "Load Default Sentence/Rate Selection" and press enter.