Jrc Nmea Speed Log Manual Posted on 20-04-2021 by admin Jrc Nmea Speed Log Manual PdfSpecsStep-downTransformerNBL-177 (three-phase 440V→220V) NBL-175 (single-phase 220V→100V) CBC3000D 115V (single phase 115V→100V)NSK UnitCMJ-304E