The VDR (Voyage Data Recorder) is the maritime equivalent to the black box that visit is used by airlines. The system typically consists of two components, consisting a data-collection device and a deck-mounted protective pod that is designed to resist shock as well as fire, deep-sea pressing, and penetration. It is used to document the events of navigation, but can also provide valuable data for heavy-weather damage analysis as well as performance monitoring and crew training.
Up-grading
Many ships with VDR/SVDR meet the minimum requirements of regulatory compliance. However, members are encouraged use the equipment to record near misses, conduct investigation into incidents and to conduct preventive maintenance. There are also software options that could significantly extend the period of time for which VDR data is available beyond the current minimum of 12 hours and a decision should be taken on whether or not to upgrade to this.
The system is constructed around an industrial computer that is able to perform a number of functions including processing and encoding the data that is gathered from the sensors. The capsule is designed to survive any incident and also store the data. The primary components of the VDR system include a collection unit, which is situated on the bridge, a separate power source, an interface unit and backup batteries. The unit gathers data from all sources integrated, including microphones to record bridge audio, and sends it to the Concentrator. There, a series of NMEA 0183 sentences are interpreted and encoded to be transmitted to the final recording medium.
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