Compliant with ITU, IMO and GMDSS standard. Adoption of new conceptual SYNTHESIZER technology improves voice quality, no-nosie. Compact size and simplified key and dial enables to operate efficiently. Realization of dual display for NBDP terminal and SRG-3150DN makes it easier to read data. Designed DSC and W/K receiver built-in integrated transceiver. Available rapid scanning for the variation of trnsmitting power, frequencies and channel by group or individual. High stability for frequency with 10Hz Step Synthesizer. Storing up to 100 transmitted message(editable). Storing up to 100 received message. (50 messages for distress and 50 for ordinary) Self-diagnosis function for easy maintenance. Speaker built-in. (external speaker : option)