What is the difference between VDR and S-VDR?

What is the difference between VDR and S-VDR?

S-VDR. The SVDR is nothing but a simplified VDR, that records information that is only absolutely necessary and does not record information as extensive as the VDR. Naturally, it is more cost effective and more in usage on board merchant ships.

What is being recorded in S-VDR?

The primary purpose of a voyage data recorder (VDR) or a simplified voyage data recorder (S-VDR) is to maintain a store of information, in a secure and retrievable form, concerning the position, movement, physical status, command and control of a vessel over the period leading up to and following an incident.

How does a VDR work?

VDR is usually two-part system consisting of a data collecting unit, and a protected storage unit that stores the retrieved data. The main component of the system is carried inside the ship and is connected to a deck-mounted protective capsule which houses a fixed high-capacity solid state memory block.

Who has the right in the custody read out and access to the VDR and S-VDR information?

1 The ship owner will, in all circumstances and at all times, own the VDR and its information. However, in the event of an accident the following guidelines would apply. The owner of the ship should make available and maintain all decoding instructions necessary to recover the recorded information.

What is AIS Vessel Tracking?

The automatic identification system (AIS) is an automatic tracking system that uses transceivers on ships and is used by vessel traffic services (VTS). When satellites are used to detect AIS signatures, the term Satellite-AIS (S-AIS) is used.

What is rate of turn ship?

Rate of turn indicator or ROTI on board vessels indicates the rate a ship is turning. It indicates the rate a ship is turning in degrees per minute (°/min) . It is one of the most important instruments a helmsman can have when steering a course.

Why are VDRs required?

VDRs are required to meet performance standards “not inferior to those adopted by the Organization”. They state that the VDR should continuously maintain sequential records of preselected data items relating to status and output of the ship’s equipment and command and control of the ship.

Why do we need a VDR?

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 purposes to improve safety and reduce running costs.

Who can exempt ships from having a VDR installed on them?

Administrations
Administrations may exempt ships, other than ro-ro passenger ships, constructed before 1 July 2002, from being fitted with a VDR where it can be demonstrated that interfacing a VDR with the existing equipment on the ship is unreasonable and impracticable.

What are the problems caused by installation of AIS?

Ship-Originated AIS Messages