Voyage Data Recorder

Voyage Data Recorder

Voyage Data Recorder, or VDR, is a data recording system designed for all vessels required to comply with the IMO's International Convention SOLAS Requirements (IMO Res.A.861(20)) in order to collect data from various sensors on board the vessel. It then digitizes, compresses and stores this information in an externally mounted protective storage unit. The protective storage unit is a tamper-proof unit designed to withstand the extreme shock, impact, pressure and heat, which could be associated with a marine incident (fire, explosion, collision, sinking, etc).

The protective storage unit may be in a retrievable fixed unit or free float unit (or combined with EPIRB) when the ship sunk in marine incident. The last 12 hours of stored data in the protected unit can be recovered and replayed by the authorities or ship owners for incident investigation. Beside the protective storage unit, the VDR system may consist of recording control unit and data acquisition unit, which connected to various equipment and sensors on board a ship.

Although the primary purpose of the VDR is for accident investigation after the fact, there can be other uses of recorded data for preventive maintenance, performance efficiency monitoring, heavy weather damage analysis, accident avoidance and training purpose to improve safety and reduce running cost.

Simplified Voyage Data Recorder (S-VDR), as defined by the requirements of IMO Performance Standard MSC.163(78), is a lower cost simplified version VDR for small ships with only basic ship's data recorded.

Voyage data

The information recorded in the unit(s), sometimes also called "Black box for ship", may include the following information:-

*GPS - Date, time and position,
*speed log - Speed through water or speed over ground,
*gyro compass - Heading,
*radar* - As displayed or AIS data if no off-the-shelf converter available for the Radar video,
*bridge audio - Including bridge wings,
*VHF radio communications
*echo sounder* - Depth under keel,
*main alarms* - All IMO mandatory alarms,
*hull openings* - Status of hull doors as indicated on the bridge,
*watertight & fire doors* - Status as indicated on the bridge,
*hull stress* - Accelerations and hull stresses,
*rudder* - Order and feedback response,
*engine/propeller* - Order and feedback response,
*thrusters* - Status, direction, amount of thrust % or RPM,
*anemometer and weather vane* - Wind speed and direction,

Data marked with * may not be recorded in S-VDR, except Radar and Echo Sounder if data & standard interfaces available.

ee also

*Flight recorder
*Black box (transportation)
*Distress radiobeacon

External links

* [http://www.imo.org/Safety/mainframe.asp?topic_id=768 IMO Voyage data recorders]
* [http://www.headwaytech.com Headway VDRs kevin.zhangjun@gmail.com]

* [http://www.km.kongsberg.com/KS/WEB/NOKBG0240.nsf/AllWeb/1021F219D0D20EAAC1256FA5004AA68B?OpenDocument Data recorded]
* [http://www.rutter.ca/product/products/prodinfo/VDRs/pr_prdcts_vdr-txt-main.asp Rutter VDRs]


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