VDR (Voyage Data Recorder) is the maritime version of the black box airlines use. The system is typically two-part and consists of an information-collecting unit that is connected to a deck-mounted protective capsule designed to withstand fire, deep-sea pressure, shock and penetration. It is used to record the events of navigation, but can also provide valuable data to assess damage during heavy weather monitoring performance and crew training.

Up-grading

Many ships fitted with VDR/SVDR devices meet the minimum requirements of regulatory compliance however, Members are urged to consider using the equipment to investigate incidents, preventive maintenance and bridge team training as and for recording near misses. There are other packages that can extend the period during which VDR data will be available beyond the current minimum of 12 hours. A decision must be made on whether to upgrade.

The system is based on an industrial grade computer that performs a number functions, including processing and encoding data received from sensors. The capsule is designed to withstand any accident and store the data. The major components of the VDR system include a 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 sends it to the Concentrator. There, it is processed into a series of NMEA 0183 sentences is interpreted and encoded to be transmitted to the final recorded medium.

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