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861(20) Performance standards for Shipborne Voyage Data Recorders (VDRs)
Geldigheid:27-11-1997 t/m Versie:vergelijk
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Performance standards for Shipborne Voyage Data Recorders (VDRs)

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861(20) Performance standards for Shipborne Voyage Data Recorders (VDRs)


RECALLING Article 15(j) of the Convention on the International Maritime Organization concerning the functions of the Assembly in relation to regulations and guidelines concerning maritime safety,

RECALLING ALSO that, by resolution 12, the Conference of Contracting Governments to the International Convention for the Safety of Life at Sea (SOLAS), 1974, being of the opinion that it would be desirable that ships, in particular passenger ships, be fitted with voyage data recorders (VDRs) to assist in investigations into casualties, requested the Maritime Safety Committee to develop, as a matter of urgency, operational requirements and performance standards for such recorders, taking into account any potential human element implications,

NOTING that consideration is being given to the development of carriage requirements for VDRs for inclusion in the SOLAS Convention at the earliest opportunity,

HAVING CONSIDERED the recommendations made by the Maritime Safety Committee at its sixty-eighth session and by the Sub-Committee on Safety of Navigation at its forty-third session,

1. ADOPTS the Recommendation on Performance Standards for Shipborne Voyage Data Recorders (VDRs), set out in the annex to the present resolution;

2. INVITES Governments to encourage shipowners and operators of ships entitled to fly their flag to install VDRs on such ships, as soon as possible, especially considering that the carriage of VDRs may soon be made mandatory under the SOLAS Convention;

3. RECOMMENDS Governments to ensure that VDRs installed on board ships flying their flag conform to performance standards not inferior to those specified in the Annex to this resolution;

4. REQUESTS the Maritime Safety Committee to keep these Performance Standards under review and to adopt amendments thereto, as necessary.

1 Purpose

The purpose of a voyage data recorder (VDR) is to maintain a store, in a secure and retrievable form, of information concerning the position, movement, physical status, command and control of a vessel over the period leading up to and following an incident having an impact thereon. Information contained in a VDR should be made available to both the Administration and the shipowner. This information is for use during any subsequent investigation to identify the cause(s) of the incident.

2 Application

A VDR with capabilities not inferior to those defined in these performance standards is required to be fitted to ships of classes defined in SOLAS chapter V, as amended.

3 References

3.1 SOLAS:
  • 1995 SOLAS Conference, resolution 12.

3.2 IMO resolutions:
  • A.662(16) Performance standards for float-free release and activation arrangements for emergency radio equipment
  • A.694(17) General requirements for shipborne radio equipment forming Part of the GMDSS and for electronic navigational aids
  • A.824(19) Performance Standards for devices to indicate speed and distance
  • A.830(19) Code on alarms and Indicators, 1995
  • MSC.64(67), Performance Standard for heading control Systems annex 3
  • MSC.64(67), Performance Standards for radar Equipment, as amended annex 4

4 Definitions

4.1 Voyage data recorder (VDR) means a complete system, including any items required to interface with the sources of input data, for processing and encoding the data, the final recording medium in its capsule, the power supply and dedicated reserve power source.

4.2 Sensor means any unit external to the VDR, to which the VDR is connected and from which it obtains data to be recorded.

4.3 Final recording medium means the item of hardware on which the data is recorded such that access to it would enable the data to be recovered and played back by use of suitable equipment.

4.4 Playback equipment means the equipment, compatible with the recording medium and the format used during recording, employed for recovering the data. It includes also the display or presentation hardware and software that is appropriate to the original data source equipment.*

4.5 Dedicated reserve power source means a secondary battery, with suitable automatic charging arrangements, dedicated solely to the VDR, of sufficient capacity to operate it as required by 5.3.2.

* Playback equipment is not normally installed on a ship and is not regarded as part of a VDR for the purposes of these performance standards.

5 Operational requirements

5.1 General

5.1.1 The VDR should continuously maintain sequential records of preselected data items relating to the status and output of the ship's equipment, and command and control of the ship, referred to in 5.4.

5.1.2 To permit subsequent analysis of factors surrounding an incident, the method of recording should ensure that the various data items can be co-related in date and time during playback on suitable equipment.

5.1.3 The final recording medium should be installed in a protective capsule which should meet all of the following requirements:
.1 be capable of being accessed following an incident but secure against tampering;
.2 maximize the probability of survival and recovery of the final recorded data after any incident;
.3 be of a highly visible colour and marked with retro-reflective materials; and
.4 be fitted with an appropriate device to aid location.

5.1.4 The design and construction, which should be in accordance with the requirements of resolution A.694(17) and international standards acceptable to the Organization*, should take special account of the requirements for data security and continuity of operation as detailed in 5.2 and 5.3.

5.2 Data selection and security

5.2.1 The minimum selections of data items to be recorded by the VDR are specified in 5.4. Optionally, additional items may be recorded provided that the requirements for the recording and storage of the specified selections are not compromised.

5.2.2 The equipment should be so designed that, as far as is practical, it is not possible to tamper with the selection of data being input to the equipment, the data itself nor that which has already been recorded. Any attempt to interfere with the integrity of the data or the recording should be recorded.

5.2.3 The recording method should be such that each item of the recorded data is checked for integrity and an alarm given if a non-correctable error is detected.

5.3 Continuity of operation

5.3.1 To ensure that the VDR continues to record events during an incident, it should be capable of operating from the ship's emergency source of electrical power.

5.3.2 If the ship's emergency source of electrical power supply fails, the VDR should continue to record Bridge Audio (see 5.4.5) from a dedicated reserve source of power for a period of 2 h. At the end of this 2 h period all recording should cease automatically.

5.3.3 Recording should be continuous unless interrupted briefly in accordance with 6 or terminated in accordance with 5.3.2. The time for which all stored data items are retained should be at least 12 h. Data items which are older than this may be overwritten with new data.

5.4 Data items to be recorded

5.4.1 Date and time
Date and time, referenced to UTC, should be obtained from a source external to the ship or from an internal clock. The recording should indicate which source is in use. The recording method should be such that the timing of all other recorded data items can be derived on playback with a resolution sufficient to reconstruct the history of the incident in detail.

5.4.2 Ship's position
Latitude and longitude, and the datum used, should be derived from an electronic position-fixing system (EPFS). The recording should ensure that the identity and status of the EPFS can always be determined on playback.

5.4.3 Speed
Speed through the water or speed over the ground, including an indication of which it is, derived from the ship's speed and distance measuring equipment.

5.4.4 Heading
As indicated by the ship's compass.

5.4.5 Bridge Audio
One or more microphones positioned on the bridge should be placed so that conversation at or near the conning stations, radar displays, chart tables, etc., are adequately recorded. As far as practicable, the positioning of microphones should also capture intercom, public address systems and audible alarms on the bridge.

5.4.6 Communications audio
VHF communications relating to ship operations should be recorded.

5.4.7 Radar data, post-display selection
This should include electronic signal information from within one of the ship's radar installations which records all the information which was actually being presented on the master display of that radar at the time of recording. This should include any range rings or markers, bearing markers, electronic plotting symbols, radar maps, whatever parts of the SENC or other electronic chart or map that were selected, the voyage plan, navigational data, navigational alarms and the radar status data that were visible on the display. The recording method should be such that, on playback, it is possible to present a faithful replica of the entire radar display that was on view at the time of recording, albeit within the limitations of any bandwidth compression techniques that are essential to the working of the VDR.

5.4.8 Echo sounder
This should include depth under keel, the depth scale currently being displayed and other status information where available.

5.4.9 Main alarms
This should include the status of all mandatory alarms on the bridge.

5.4.10 Rudder order and response
This should include status and settings of auto-pilot if fitted.

5.4.11 Engine order and response
This should include the positions of any engine telegraphs or direct engine/propeller controls and feedback indications, if fitted, including ahead/astern indicators. This should also include status of bow thrusters if fitted.

5.4.12 Hull openings status
This should include all mandatory status information required to be displayed on the bridge.

5.4.13 Watertight and fire door status
This should include all mandatory status information required to be displayed on the bridge.

5.4.14 Accelerations and hull stresses
Where a ship is fitted with hull stress and response monitoring equipment, all the data items that have been pre-selected within that equipment should be recorded.

5.4.15 Wind speed and direction
This should be applicable where a ship is fitted with a suitable sensor. Either relative or true wind speed and direction may be recorded, but an indication of which it is should be recorded.

* Refer to publication IEC 945-Maritime navigation and radiocommunication equipment and systems - General requirements, methods of testing and required test results.

6 Operation

The unit should be entirely automatic in normal operation. Means should be provided whereby recorded data may be saved by an appropriate method following an incident, with minimal interruption to the recording process.

7 Interfacing

Interfacing to the various sensors required should be in accordance with the relevant international interface standard, where possible. Any connection to any item of the ship's equipment should be such that the operation of that equipment suffers no deterioration, even if the VDR system develops faults.

8 Ergonomics

8.1 The following functions should be directly accessible and immediately effected:

- On-/off-switch

- Gain

- Monitor brilliance

- Presentation made

- Tuning (if manual)

- Anticlutter sea

- Range selection

- Variable range marker

- Anticlutter rain

- Maker (cursor)

- Electronic bearing line

- Dimmer for panel illumination

8.2 The following functions should be continuously variable or in small, quasi-analogue steps:

- Monitor brilliance

- Anticlutter sea

- Tuning (if manual)

- Variable range marker

- Anticlutter rain

- Maker (cursor)

- Electronic bearing line

- Gain

8.3 The settings of the following functions should be readable in all light condition:

- Dimmer for panel illumination

- Tuning (if manual)

- Gain

- Anticlutter rain

- Anticlutter sea

- Monitor brilliance

8.4 for the following functions additional automatic adjustment may be provided. The use of the automatic mode be indicated to the operator and be capable of being switched off:

- Monitorbrilliance

- Gain

- Anticlutter rain

- Anticlutter sea

8.5 If discrete controls are available for the EBL and VRM they should be situated on the left and right hand side respectively.

8 Download and playback equipment for investigation authorities

8 - Download and playback equipment for investigation authorities

8.1 Data Output Interface

8.1 -Data output interface

The VDR should provide an interface for downloading the stored data and playback the information  to  an  external  computer.   The  interface  should  be  compatible  with  an internationally recognized format, such as Ethernet, USB, FireWire, or equivalent.

8.2 Software For Data Downloading And Playback

8.2 - Software For Data Downloading And Playback

8.2.1 A  copy  of  the  software  programme  providing  the  capability  to  download  the stored data and playback the information onto a connected external laptop computer and for the playback of the data should be provided for each VDR installation.

8.2.2    The  software  should  be  compatible  with  an  operating  system  available  with commercial-off-the-shelf  laptop  computers  and  provided  on  a  portable  storage  device such as a CD-ROM, DVD, USB-memory stick, etc.

8.2.3 Instructions  for  executing  the  software  and  for  connecting  the  external  laptop computer to the VDR should be provided.

8.2.4 The  portable  storage  device  containing  the  software,  the  instructions  and  any special (not commercial-off-the-shelf) parts necessary for the physical connection of the external laptop computer, should be stored within the main unit of the VDR.

8.2.5 Where  non-standard  or  proprietary  formats  are  used  for  storing  the  data  in  the VDR,  the  software  for  converting  the  stored  data  into  open  industry  standard  formats should be provided on the portable storage device or resident in the VDR."


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