The VDR (Voyage Data Recorder), is the maritime equivalent of the black boxes used by airlines. The system typically consists of two http://www.digitaldealdataroom.info/database-access-control-best-practices components comprised of a data-collection device and a deck-mounted protective pod designed to withstand shock and fire, deep-sea pressure, and penetration. It is typically used to record incidents during navigation, but also provides useful data for analysis of heavy weather damage and monitoring of performance, as well as for crew training.
Up-grading
Many ships equipped with VDR/SVDR satisfy the minimum regulatory requirements. However, Members are encouraged to use the equipment to record near missed events, conduct investigations into incidents and to conduct preventive maintenance. There are also programs that allow for an extension of the duration during which VDR data is available beyond the minimum of 12 hours. A decision should be taken on whether to upgrade the equipment.
The system is built around an industrial-grade computer that can perform a number functions, including processing and encoding data from sensors. It then stores the data in a capsule designed to withstand an accident and provide proof of what happened onboard the ship. The main components of the VDR system are a data collection unit, which is situated on the bridge, a separate power source and an interface unit, as well as backup batteries. The unit collects data from all integrated sources including microphones, which record bridge audio, and then sends it to the Concentrator. There, it is processed into a series of NMEA 0183 sentences are interpreted and encoded before being sent to the final recording medium.
