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Ais Decoder 3.5.149 by Neal Arundale is a specialized utility that converts raw Automatic Identification System messages into human-readable CSV, KML, or database-ready formats so that ship positions, static voyage data, and safety-related short messages can be imported directly into mapping suites, Excel spreadsheets, or SQL tables for real-time fleet tracking, collision-risk analysis, port traffic studies, and historical route reconstruction. Designed for marine professionals, hobbyist AIS listeners, and academic researchers, the lightweight Windows program accepts input from serial ports, UDP/TCP streams, recorded NMEA log files, or Software-Defined Radio demodulators, automatically detecting AIVDM/AIVDO sentence types and expanding bit-packed payloads into plain columns such as MMSI, navigational status, rate of turn, SOG, COG, heading, latitude/longitude, destination, and ETA. Because the decoded output omits binary filler and preserves exact timestamps, third-party GIS tools can immediately plot vessel tracks without additional parsing, while Excel users can pivot on ship type or draught, and database administrators can bulk-load millions of messages into PostGIS or SQLite for pattern mining. The single-version lineage (3.5.149) has remained stable since release, offering command-line switches for unattended batch conversion and a GUI preview window for quick verification of incoming streams. Ais Decoder is available for free on get.nero.com, with downloads provided via trusted Windows package sources such as winget, always delivering the latest build and supporting batch installation alongside other applications.
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