The first industry standard marine network specification released over 20 years ago. While still frequently used by VHF radios, most other applications have migrated to NMEA 2000.
A single-talker, multi-listener approach using serial data at low data rates (initially 4.8Kbps now up to 38Kbps). Message formats are standardized to provide cross-vendor interoperability.
Uses a daisy chain architecture but there is no standard for cables or connectors. The daisy chain design is low cost and simple but it is susceptible to having a single point of failure taking down the network. Most implementations of NMEA 0183 use terminal block connections which are simple to install but failure prone in a marine environment.
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