VDR (Voyage Data Recorder) is the maritime version of the black box that airlines employ. The system is typically two-part and consists of a data collecting unit connected to a protective capsule on deck designed to withstand fire, deep sea pressure and shock, as well as penetration. It is often used for recording navigation incidents, but it can also provide valuable information for heavy weather damage analysis and monitoring of performance as well as training for crew members.
Up-grading
Many ships equipped with VDR/SVDR technology meet the bare minimum regulatory requirements However, the crew is encouraged to think about using the equipment for incident investigation, preventive maintenance and bridge team training, as and for recording near misses. In addition, there are applications that can increase the amount of time that VDR information is available, starting from the current 12 hour minimum and a choice should be made about 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 received from the sensors. It then stores the data in a capsule that is designed to stand up to an accident and provide proof of what occurred onboard the vessel. The primary components of the VDR system are a data collection unit, which is situated on the bridge, a separate power source along with an interface unit as well as batteries for backup. The unit gathers data from all sources integrated including microphones, which record bridge audio, and then sends it to the Concentrator. There, a series of NMEA 0183 sentences is interpreted and encoded prior to being transmitted to the final recorded medium.
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