Function / Purpose
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It’s an NMEA 0183 / IEC 61162 input module used in Rutter VDR (Voyage Data Recorder) systems.
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Specifically, it supports 8 serial NMEA-0183 input channels, allowing multiple navigation data sources (e.g. GPS, AIS, depth, speed) to be multiplexed / recorded.
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According to the VDR-100G2 installation manual, the NMEA module is configured via a configuration utility over Ethernet.
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The manual says you “select the number of NMEA channels (4, 8, or 4 with VHW)” when configuring.





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