VDR’s

The primary function of a (S)VDR is to provide a secure and retrievable records of ship’s voyage data. This includes capturing data from various ship sensors and systems continuously throughout the voyage. In case of an incident or accident, the (S)VDR serves as a crucial tool for accident investigation and reconstruction. It helps maritime authorities and ship operators understand the sequence of events leading up to an incident, identify potential safety improvements, and enhance overall maritime safety.

A VDR records a comprehensive set of data essential for accident investigation and voyage reconstruction. This includes but is not limited to:

• Ship’s position, speed, and heading.
• Bridge audio including VHF radio audio.
• Radar images depicting surrounding maritime traffic and obstacles.
• ECDIS images.
• Engine parameters such as RPM and fuel consumption.
• Rudder movements and steering commands.
• Status of hull openings and critical systems.
• Environmental data like wind speed and direction.
• Etc.

The main difference between a VDR (Voyage Data Recorder) and an SVDR (Simplified Voyage Data Recorder) lies in their scope and requirements. A VDR is a comprehensive data recording system mandated for vessels engaged in international voyages including cargo vessels above 3.000 gross tonnage and passenger ships built after 1st July 2002. It records a wide variety of ship’s data such as position, speed, heading, bridge audio, radar data, engine parameters, and more. This extensive data is crucial for accident investigation and voyage reconstruction.

On the other hand, an SVDR serves a similar purpose but is required for vessels built before 1^st July 2002. It records a minimum set of sensor data, like position, time and date, etc. unlike a full VDR but has only the requirement for at least one Fixed Recording Medium (FRM) or one Float Free Recording Medium (FRMM) unlike a VDR.

Choosing the right VDR involves several considerations tailored to your vessel’s specific needs and regulatory requirements. Key factors are:

• Year of the build of the vessel
• Gross tonnage of the vessel
• Trading pattern of the vessel (engaged in international voyages)
• Function of the vessel (passenger / ro-ro / cargo)
• Available sensors on the vessel

Firstly, ensure compliance with IMO regulations under SOLAS Chapter V, Regulation 18 and 20, which outlines the performance standards and installation requirements for VDRs.

Secondly, assess compatibility with your vessel’s existing systems and infrastructure to ensure seamless integration. Reliability is crucial in maritime environments, so select a VDR known for robustness and durability.

Finally, factor in the initial cost of installation as well as annual performance maintain compliance and operational readiness.

Yes, (S)VDRs are subject to regulated performance tests.

• Operational Performance Tests (OPT)
  According to resolution MSC. 333(90), the Voyage Data Recorder (VDR) must be capable of undergoing a performance test at any time, such as annually or after repairs or maintenance. This test, conducted via the Bridge Control Unit, ensures all required data items are correctly recorded. Netwave Systems recommends performing an Operational Performance Test (OPT) monthly using the Bridge Control Unit to check the status of all connected sensors.
• Annual Performance Tests (APT) (S)VDRs must undergo an annual performance test to be verified by the manufacturer y that they are functioning correctly and recording data accurately. Regular maintenance is essential to keep the (S)VDR operational and ready for inspection by maritime authorities.

A CoC is issued by the manufacturer to vessels upon successful installation and inspection of an (S)VDR. It confirms that the VDR onboard meets the regulatory requirements specified by the IMO under SOLAS Chapter V and the Maritime Safety Circular 333(90) or similar regulations. The CoC serves as proof that the vessel complies with international maritime safety standards regarding data recording and accident investigation capabilities.

During the (S)VDR APT, several critical aspects are evaluated to ensure the system’s functionality and compliance:

• Verification of the minimal required data is recorded.
• Verification that all recorded data is retrievable and readable.
• Verify the integrity and reliability of data storage and recording mechanisms.
• Verify that all communication interfaces are operational.

Assess the overall performance of the VDR to ensure it meets regulatory requirements and remains operational for accident investigation purposes.