VDR (Voyage Data Recorder) is the maritime version of the black box airlines use. The system is typically two-part and consists of a data collecting unit connected to a deck-mounted protective capsule designed to withstand fire, deep-sea pressure and shock as well as penetration. It is used primarily for recording navigation incidents, but also provides useful data for analysis of heavy weather damage and monitoring performance as well as for crew training.
Up-grading
Many ships fitted with VDR/SVDR equipment meet the minimum regulatory requirements however, Members are urged to think about using the equipment for incident investigation as well as preventive maintenance and bridge team training as in addition to recording near misses. There are also programs that allow for an extension of the duration for which VDR data will be available beyond the minimum of 12 hours. A decision must be taken on whether to upgrade the equipment.
The system is based on an industrial grade computer that performs several functions, including processing and encoding data from sensors. The capsule is designed to withstand any accident and store the data. The major components of the VDR system comprise a data collection unit, which is situated on the bridge, a separate power source and an interface unit, as well as batteries for backup. The unit collects all information from the integrated sources, including http://www.digitaldealdataroom.info/database-access-control-best-practices/ microphones to record bridge audio, and then sends it to a Concentrator which is where a string of NMEA 0183 sentences is interpreted and coded to be sent to the final recorded media.
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