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VDR (Voyage Data Recorder) is the maritime equivalent of the black box airlines use. The system is usually two-part and consists of an data collection unit that is attached to a protective capsule mounted on deck designed to withstand fire, deep-sea pressure shock, and penetration. It’s used to record events that occur during navigation, but it can also provide valuable data to assess damage during heavy weather as well as performance monitoring and crew training.
Up-grading
Many ships equipped with VDR/SVDR meet the minimum requirements of regulatory compliance. However, Members are encouraged to use the equipment to document near misses, conduct incident investigations, and for preventative maintenance. There are also packages that can extend the duration for which VDR data will be available beyond the current minimum of 12 hours. The decision needs to be taken as to whether or not to upgrade the equipment.
The system is built around an industrial grade computer that performs various functions, including processing and encoding data received from sensors. The data is stored in a capsule that is designed to survive an accident and provide proof of what took place on the vessel. The VDR system consists of the data collection device that is located on the bridge as along with a separate power supply and interface unit, and backup batteries. The unit gathers data from all sources integrated, including microphones to record bridge audio and transmits it to the Concentrator. There, a series of NMEA 0183 sentences are read and encoded prior to being transmitted to the final recorded medium.
