IEC 61996 1 Edition 2 0 2013 05 INTERNATIONAL STANDARD Maritime navigation and radiocommunication equipment and systems – Shipborne voyage data recorder (VDR) – Part 1 Performance requirements, method[.]
Terms and definitions
For the purposes of this document the following terms and definitions apply
3.1.1 alert announcement of abnormal situations and conditions requiring attention Alerts are divided in four priorities: emergency alarms, alarms, warnings and cautions
3.1.2 alarm high priority of an alert A condition requiring immediate attention and action, to maintain the safe navigation and operation of the ship
3.1.3 bridge work station position at which a person is expected to be when performing one of the normal bridge duties at, for example, the following work stations:
Caution represents the lowest priority of an alert, indicating a condition that does not necessitate an alarm or warning However, it still requires attention and careful consideration of the situation or the information provided.
A caution is signaled by a consistent visual alert accompanied by a detailed message, allowing the bridge team to recognize and resolve the caution condition No acknowledgment is necessary, and the caution will be automatically cleared once the issue is addressed.
The combined EPIRB/VDR capsule is a single unit that fulfills all the requirements for a satellite EPIRB as mandated by SOLAS IV, as well as meeting the specifications for a VDR in accordance with SOLAS V carriage requirements.
Note 1 to entry: Combined EPIRB/VDR capsule was defined by IMO COMSAR 8
Configuration data outlines the vessel's equipment, its installation, and its connection to the Voyage Data Recorder (VDR) This information is essential for the storage and playback software, which utilizes the data to maintain the record and transform it into useful insights for casualty investigations during playback.
Note 1 to entry: See (MSC.333(90)/4.10)
Data refers to any information captured by the VDR for recording purposes, encompassing numerical values, text, audio, radar signals, and all configuration data, unless explicitly stated otherwise or dictated by the context.
3.1.8 dedicated reserve power source a battery, with suitable automatic charging arrangements, dedicated solely to the VDR, of sufficient capacity to operate it as required by 5.4.2
Note 1 to entry: See (MSC.333(90)/4.9)
The final recording medium refers to the hardware components where data is stored, allowing for recovery and playback with appropriate equipment It encompasses a combination of fixed recording mediums, float-free recording mediums, and long-term recording mediums, collectively recognized as the ultimate means of data storage.
Note 1 to entry: See (MSC.333(90)/4.3)
The fixed recording medium is a crucial component of the Final Recording Medium, designed to withstand fire, shock, and prolonged submersion on the ocean floor It is anticipated to be retrieved from the deck of a sunken vessel and is equipped with a location-indicating feature.
Note 1 to entry: See (MSC.333(90)/4.4)
3.1.11 float-free recording medium part of the Final Recording Medium which should float-free after a sinking It has a means of indicating location
Note 1 to entry: See (MSC.333(90)/4.5)
3.1.12 long-term recording medium permanently installed part of the Final Recording Medium It provides the longest record duration and has a readily accessible interface for downloading the stored data
Note 1 to entry: See (MSC.333(90)/4.6)
3.1.13 playback equipment any data medium with the playback software, the operational instructions and any special parts required for connecting a commercial-off-the-shelf laptop computer to the VDR
Note 1 to entry: See (MSC.333(90)/4.7)
Playback software must enable users to download and play back stored data effectively It should be compatible with commonly used operating systems on commercial laptops Additionally, if the data in the VDR is stored in non-standard or proprietary formats, the software must convert it into open industry standard formats for accessibility.
Note 1 to entry: See (MSC.333(90)/4.8)
3.1.15 playback system system including the playback equipment that is capable of downloading and playing back the recorded data
The VDR complete system encompasses all necessary components for interfacing with input signal sources, processing and encoding those signals, and includes the final recording medium, playback equipment, power supply, and a dedicated reserve power source.
Note 1 to entry: See (MSC.333(90)/4.1)
3.1.17 resolution smallest detectable increment between two values
3.1.18 signal source any sensor or device external to the VDR, to which the VDR is connected and from which it obtains signals and data to be recorded
Note 1 to entry: See (MSC.333(90)/4.2).
Abbreviations
EPFS Electronic position-fixing system
GMDSS Global maritime distress and safety system
SINAD Signal to noise and distortion
STIPA Speech transmission index for public address systems
General
Performance requirements described in this clause are specified by reference to the numbered paragraphs of IMO Resolution MSC.333(90).
Purpose
The Voyage Data Recorder (VDR) is designed to securely store and retrieve critical information about a vessel's position, movement, physical status, and command and control, particularly before and
Administration and the shipowner This information is for use during any subsequent safety investigation to identify the cause(s) of the incident.
Operational requirements
Design and construction
(MSC.333(90)/5.1.4) The design and construction, which shall be in accordance with the requirements of resolution A.694(17) and international standards acceptable to the
International Maritime Organization (IMO), shall take special account of the requirements for data security and continuity of operation as detailed in 4.4 and 4.5.
Maintenance of sequential records
The VDR must consistently record sequential data concerning the ship's equipment status and output, as well as its command and control, as outlined in section 4.6.
Co-relation in date and time
To facilitate the analysis of factors related to an incident, it is essential that the recording method allows for the correlation of various data items by date and time during playback on appropriate equipment.
The recording method must ensure that the timing of all recorded data items is retrievable during playback, providing a resolution adequate to thoroughly reconstruct the incident's history.
Final recording medium
4.3.4.1 Items of final recording medium
(MSC.333(90)/5.2) The final recording medium shall consist of the following items:
2) Float-free recording medium; and
(MSC.333(90)/5.2.1) The fixed recording medium shall be installed in a fixed protective capsule which shall meet all of the following requirements:
1) be capable of being accessed following an incident but secure against a physical or electronically manipulated change or deletion of recorded data;
2) maintain the recorded data for a period of at least 2 years following termination of recording;
3) maximize the probability of survival against fire, shock, penetration and deep-sea-pressure and recovery of the final recorded data after any incident;
4) be of a highly visible colour and marked with retro-reflective materials; and
5) be fitted with an appropriate device to aid location under water
(MSC.333(90)/5.2.2) The float-free recording medium shall be installed in a float-free capsule which shall meet all of the following requirements:
1) be fitted with means to facilitate grappling and recovery;
2) maintain the recorded data for a period of at least 6 months following termination of recording;
3) be so constructed as to comply with the requirements specified in resolution IMO A.810(19) and to minimize risk of damage during recovery operations;
4) be capable of transmitting an initial locating signal and further locating homing signal for at least 48 hours over a period of not less than 7 days/168 hours; and
5) be capable of being accessed following an incident but secure against a physical or electronically manipulated change or deletion of recorded data
(MSC.333(90)/5.2.3) The long-term recording medium shall:
1) be capable of being accessed from an internal, easily accessible area of the vessel; and
2) provide access to the data held on it but be secured against a physical or electronically manipulated change or deletion of recorded data
4.3.4.2 Assessment of fixed recording medium
In situations where the storage medium cannot be easily inspected after an incident, it is essential to implement measures that allow accident investigators to assess whether the medium has experienced excessive heat, which could jeopardize the integrity of the stored data, before attempting any data recovery.
4.3.4.3 Access to data in capsule
A capsule is used to enclose the fixed and float-free final recording medium (4.3.4.1.2 and
A means shall be provided to retrieve stored information from the capsule via an external device without opening the capsule
The capsule, together with any outermost shell, shall be of a highly visible fluorescent orange colour, marked with retro-reflective materials that comply with the relevant requirements of
IMO A.658(16) and marked with the legend:
“VOYAGE DATA RECORDER – DO NOT OPEN –
The fixed recording medium capsule shall include an acoustic underwater beacon (see 5.3)
The float-free recording medium capsule shall include a suitable radio transmitter and a light
Interfaces
Interfacing with various signal sources must comply with the IEC 61162 series international interface standards whenever feasible Connections to the ship's equipment should be designed to ensure that the operation of that equipment remains unaffected, even in the event of faults occurring within the VDR system.
As a minimum, the equipment shall support the sentences given in Annex A
The interfaces for bridge audio, communications audio and screen image capture are defined in
Any interface units which may be required to convert non-IEC 61162 signals, shall conform to the requirements of IEC 60945
Any connection to the ship's equipment must ensure that its operation remains unaffected, even in the event of faults occurring in the VDR system.
The VDR shall provide an interface for downloading the stored data to an external computer
Performance test
The system must have the capability to conduct performance tests at any time, such as annually or after repairs or maintenance of the VDR or its data sources These tests can utilize playback equipment to verify that all necessary data items are accurately recorded.
Any equipment used to perform these functions shall be permanent part of the VDR installation
Where the playback equipment is used it shall be in addition to the equipment required in
The VDR shall record date, time and test results of at least the last 10 tests on the final recording medium
NOTE The correct reading of the required data items check is performed in the recording integrity test (see 4.4.4)
The receipt of these required data items is tested in the operational performance test (see 5.12).
Data selection and security
Selection of data items
(MSC.333(90)/5.3.1) The minimum amount of operational data items to be recorded by the
VDR is specified in 4.6 Optionally, additional items may be recorded provided that the requirements for the recording and storage of the specified selections are not compromised.
Configuration data
During the commissioning of the Voyage Data Recorder (VDR), a data block that defines the VDR configuration and its connected sensors must be recorded onto the final medium This configuration data is to be permanently stored and safeguarded against unauthorized modifications, allowing changes only by authorized personnel Importantly, any alterations to this configuration must not interfere with the recording of mandatory items.
The data block must include essential system configuration details such as the type approval authority and reference, the IMO vessel identification number, and the software version(s) along with the installation date and time It should automatically record the date and time of the last configuration amendment, as well as specify microphone locations, recording channel allocations, and their respective IDs (e.g., M1, M2) Additionally, it must detail the locations of connected VHF installations, recording port allocations, and their IDs (e.g., V1, V2) For each sensor, the manufacturer, type, version number, and data interpretation should be provided The screen display outputs must also be identified with their locations and IDs (e.g., R1 for Radar, E1 for ECDIS) The source of the date and time, the ship's position from the INS or EPFS, and relative positions according to IEC 61162 POS standards must be included, along with any other necessary data inputs as specified in section 4.6.
1) identification of which equipment is supplying the data;
2) identification of the sentence (IEC 61162) which is carrying the information (see
3) if received as proprietary sentences according to IEC 61162 (for example containing converted analogue or discrete signals), information to include the location of the information within the sentence and the specification of the relations between sensor values (RPM, rudder angles, state of alert or indicator, etc.) and received values.
Resistance to tampering
The design of the equipment must ensure that, to the greatest extent possible, manipulation of the recorded data by the Voyage Data Recorder (VDR) is prevented This includes safeguarding both the data being recorded and any previously recorded information Additionally, any attempts to compromise the integrity of the data or its recording must be documented.
Recording integrity
The recording method must ensure the integrity of each data item, confirming that it matches the received data, and generate an alert accordingly.
IMO A.1021(26) given if a non-correctable error is detected
The VDR shall automatically continuously monitor the following:
Any malfunction will trigger a caution (refer to section 3.1.4), which will persist until the equipment is restored to a serviceable condition The caution status will be indicated through relay contacts (or an equivalent mechanism) that remain energized when there is no alert.
The VDR will continuously track the storage duration of each component on the final recording medium If any component's storage period drops below the minimum compliance threshold specified in section 4.5.4, a caution will be triggered and will persist as long as the condition remains.
Operation
Recording and saving of data
(MSC.333(90)/6) The unit shall be entirely automatic in normal operation.
Power source
(MSC.333(90)/5.4.1) The VDR shall be capable of operating from the ship's main and emergency source of electrical power.
Dedicated reserve power source
In the event of a failure in the ship's electrical power supply to the Voyage Data Recorder (VDR), the VDR will maintain the recording of Bridge Audio for up to 2 hours using a dedicated reserve power source After this 2-hour duration, all recordings will automatically stop.
It shall be possible to recharge the dedicated reserve power source within a period of 10 h.
Recording period and duration
(MSC.333(90)/5.4.3) Recording shall be continuous unless terminated in accordance with
4.5.3 The time for which all stored data items are retained shall be at least 30 days/720 hours on the long-term recording medium and at least 48 hours on the fixed and float-free recording media Data items which are older than this may be overwritten with new data
Recording may also be terminated, by means of a key or other secure method
This may happen in several situations: during necessary maintenance while the vessel is docked, when the vessel is temporarily out of service, or at the request of an investigative authority following a marine incident.
Data items to be recorded
Date and time
(MSC.333(90)/5.5.1) Date and time, referenced to UTC, shall be obtained from a source external to the ship and an internal clock shall be synchronized with valid date and time data
In the absence of an external time source, the internal clock will be utilized, with recordings clearly indicating the active source The recording method must ensure that all other data items can be accurately derived during playback, providing sufficient resolution and continuity to thoroughly reconstruct the incident's history.
Ship’s position
Latitude and longitude, along with the applicable datum, must be obtained from a designated EPFS or INS when available It is essential that the identity and status of the source are identifiable during playback The ship's position should be recorded with a precision of up to 0.0001 minutes of arc, as available on the vessel.
Speed
According to MSC.333(90)/5.5.3, ships must record their speed through water and over ground, both transversely and longitudinally This data should be derived from the ship's designated speed and distance measuring equipment, with a resolution of up to 0.1 knots.
Heading
(MSC.333(90)/5.5.4) As indicated by a designated ship's heading source The ship’s heading shall be recorded, as available on the ship, up to a resolution of 0,1°.
Bridge audio
Microphones must be strategically placed on the bridge to cover all workstations, ensuring that conversations are recorded as per MSC/Circ.982 guidelines The recordings should allow for clear playback of normal speaking voices, maintaining intelligibility even during regular ship operations This clarity must be upheld at all workstations, regardless of any audio alarms or background noise, including sounds from faulty equipment or wind To achieve this, a minimum of two audio recording channels is required, with additional microphones on the bridge wings recorded on a separate channel.
The equipment shall be capable of recording workstations with no more than 2 microphones per channel.
Communications audio
VHF communications related to ship operations must be recorded on a separate channel, distinct from those mentioned in section 4.6.5, and independently from the bridge audio This recording should capture both transmitted and received audio signals continuously from a fixed VHF set designated during installation, as outlined in section 5.7 for technical specifications.
Radar data – post-display selection
According to SOLAS regulations, the electronic signals from the main displays of both ship's radar installations must be recorded in a manner that allows for a faithful reproduction of the radar display during playback This replication should accurately reflect the display at the time of recording, while accommodating any necessary bandwidth compression techniques used by the Voyage Data Recorder (VDR).
NOTE In the case of a ship fitted with an INS, ‘radar display’ signifies ‘collision avoidance task and functions display’.
ECDIS
When a vessel is equipped with an ECDIS installation, the VDR must capture the electronic signals from the ECDIS display used for navigation This recording should allow for a precise reproduction of the ECDIS display during playback, while considering the constraints of bandwidth compression techniques necessary for the VDR's operation, as well as the source and version of the chart data utilized.
NOTE In the case of a ship fitted with an INS, ‘ECDIS display’ signifies ‘route monitoring task and functions display’.
Echo sounder
The depth under the keel must be recorded with a precision of 0.1 meters, as available on the vessel Additionally, the currently displayed depth scale and any other relevant status information should also be documented when accessible.
Main alarms
(MSC.333(90)/5.5.10) This shall include the status of all IMO mandatory alarms on the bridge as given in Resolution A.1021(26) Table 10.1.1 (see Annex B) or as received from the Bridge
Alert Management System, if installed, recorded as individually identified alarms.
Rudder order and response
(MSC.333(90)/5.5.11) This shall include status and settings of heading or track controller, if fitted and indicate the control station, mode, and power unit(s) in use
Both rudder order and response angles shall be recorded up to a resolution of 1° as available and permitted on the ship.
Engine and thruster order and response
The article specifies that the positions of engine telegraphs or direct engine/propeller controls must be included, along with shaft rpm or equivalent measurements It also requires feedback indications on the bridge, if available, which should feature ahead/astern indicators and clearly indicate the control station in use.
The status of bow and stern thrusters, if installed, must be documented, along with the active control station Additionally, the RPM should be recorded with a precision of 1 RPM, and the pitch should be noted with a resolution of 1°.
Hull openings (doors) status
(MSC.333(90)/5.5.13) This shall include all IMO mandatory status information required to be displayed on the bridge.
Watertight and fire door status
(MSC.333(90)/5.5.14) This shall include all IMO mandatory status information required to be displayed on the bridge.
Accelerations and hull stresses
According to MSC.333(90)/5.5.15, ships equipped with IMO-mandated hull stress and response monitoring systems must record all pre-selected data items available from that equipment.
Wind speed and direction
(MSC.333(90)/5.5.16) Where a ship is fitted with a suitable sensor, wind speed and direction shall be recorded, including its true or relative status
The wind speed shall have a resolution of 1 unit (kn, m/s, etc.) and the wind direction shall have a resolution of 1°.
AIS
(MSC.333(90)/5.5,17) All AIS data shall be recorded.
Rolling motion
(MSC.333(90)/5.5.18) The VDR shall be connected to an electronic inclinometer if installed
The recording method shall be such that the rolling motion can be reconstructed during playback.
Configuration data
During the commissioning of the Voyage Data Recorder (VDR), a data block defining its configuration and connected sensors must be recorded in the final medium This block should be kept current with the vessel's installation and include details such as the manufacturer, type, version number, identification, location of each sensor, and the interpretation of the sensor data Additionally, this configuration data must be permanently stored and safeguarded against unauthorized
Electronic logbook
(MSC.333(90)/5.5.20) Where a ship is fitted with an electronic logbook in accordance with the standards of the IMO the information from this shall be recorded
NOTE At the time of writing the IMO has not published any standards for this purpose
Co-relation in date and time
To achieve a relative timing accuracy of 0.1 seconds, all data items sampled by the VDR must be recorded with a time index from a VDR system clock that has a resolution of 0.05 seconds Additionally, the drift of this system clock should not exceed 1 second.
Particular design requirements for the final recording medium
Fixed protective capsule
The fixed design shall have a release mechanism to facilitate recovery under water both by a diver and a remotely operated vehicle (ROV)
To ensure that the capsule may be retrieved safely after release, suitable large pad eyes or handles should be incorporated
NOTE Manipulator jaws of typical underwater recovery machines have a maximum opening of only 300 mm, a gripping force limit of about 1 kN, and a pulling force limit of about 500 N.
Float-free capsule
The float-free release mechanism shall comply with the relevant requirements of IMO
Resolution A.662(16) To ensure that the capsule may be retrieved safely after release, suitable large pad eyes or handles should be incorporated
The float-free capsule shall have a light conforming to the relevant requirements of
IEC 61097-2 In addition, this light shall remain activated during daylight hours
The float-free capsule must accurately resolve and transmit its last received or current position with a minimum precision of 4 seconds of arc, adhering to the standards set by IEC 61097-2.
In case of a combined EPIRB/VDR capsule (see 3.1.5), this shall, in addition to the requirements of this standard, meet the requirements of IEC 61097-2.
Long-term recording medium
The long term recording medium shall be permanently installed and not readily removable.
Location beacons
Fixed protective capsule
The fixed protective capsule shall include an acoustic underwater beacon operating in the frequency band centered on 37,5 kHz with a battery life of 90 days, which shall meet
Float-free capsule
The float-free capsule must be equipped with a homing transmitter that operates on 121.5 MHz, in accordance with Annex D of IEC 61097-2:2008 Additionally, it should transmit a Morse letter "V" (• • • –) at a repetition period ranging from 47.5 seconds to 52.5 seconds, with a dot length of one unit.
The Morse letter "V" is transmitted following the 406 MHz signal, consisting of a sequence that includes dots and dashes Each dot represents a transmission of 1 unit, followed by a 1-unit space, while each dash lasts for 3 units, followed by a 3-unit space Consequently, the total duration of the letter "V" amounts to 12 units, with signal modulation occurring during the intervals of dots and dashes.
1 000 Hz ± 50 Hz with type of emission A3X and minimum modulation depth of 85 % The 121,5 MHz carrier is continuous except for an interruption of up to 2 s during the 406 MHz signal transmissions
Swept tone Pause for 406 MHz
Swept tone Pause for 406 MHz
Swept tone Pause for 406 MHz
Figure 1 – Insertion of Morse letter “V” in homing transmission
Survivability of recorded data
Long-term retention
The final recording medium shall retain the recorded data for a minimum period, following termination of recording, under operational and storage conditions specified by the equipment manufacturer For the
• fixed recording medium the period is 2 years,
• float-free recording medium the period is 6 months,
• long-term recording medium the period is 2 years.
Physical protection
The capsule must be engineered to guarantee the retrieval of data from the fixed recording medium without any loss, even after enduring shock conditions.
A half sine-wave pulse of 50 g, with a duration of 11 ms, as specified in Clause 11 of
A mass of 250 kg with a pin of 100 mm diameter, dropped from a height of 3 m, as specified in EUROCAE 2-4.2.2 of ED-112 c) Fire
A low temperature fire of 260 °Cnominal for 10 h, as specified in 2-4.2.5 of ED-112
A high temperature fire of 1 100 °C nominal for 1 h, as specified in 2-4.2.4 of ED-112 d) Deep-sea pressure and immersion
Immersion in sea water at a pressure of 60 MPa (equivalent to a depth of 6 000 m), as specified in EUROCAE 2-4.2.6 of ED-112
The capsule must be engineered to guarantee that data stored in the final recording medium can be retrieved intact after being exposed to salt water for a minimum of 7 days.
Information to be included in the manufacturer’s documentation
Installation guidelines
The following installation guidelines shall be included a) Siting of the fixed recording medium and float-free recording medium
The protective capsule will be located near the bridge on the vessel's external deck to enhance its chances of survival and recovery after an incident It will be placed away from rigging and other potential obstructions, ideally as close to the ship's centerline as feasible.
Criteria to be considered when assessing the optimum position shall include but not be limited to the following:
1) separation from fuel or other potential fire sources;
2) separation from probable sources of mechanical damage;
3) operational environment for continued serviceability;
5) facilitation of underwater removal and retrieval by both divers and ROVs There should be a clear unobstructed space in the vicinity of the capsule to allow an ROV or diver to work;
6) in the case of float-free recording medium, minimisation of the risk of obstruction after release b) Siting of microphones to achieve the requirements of 4.6.5 c) Siting of the data interface (4.3.5.2) d) Siting of the playback equipment (Annex C) e) Siting of all other components of the VDR system f) Entering and updating the configuration data of 4.4.2 g) The requirement for interface units to comply with 4.3.5 h) The requirement to record ship specific interface information to be recorded and the record to be left onboard.
Operation and maintenance manual
The long-term recording medium interface must be clearly described, including its location and interfacing instructions, as outlined in MSC.333(90)/7 and Annex C This information should be provided in English and included in the equipment documentation Additionally, guidance on the placement of this information should ensure it is prominently displayed near the long-term recording medium interface for easy access.
The manual must provide comprehensive instructions for the normal operation of the VDR, including data copying procedures, actions to take after a VDR alert, and guidelines for downloading and verifying data from the final recording medium It should also detail the playback verification of recorded sensor data, outline essential maintenance tasks to ensure the VDR's serviceability and seaworthiness, and include analysis for identifying potentially degraded sensors Additionally, the manual should instruct on updating ship-specific interface records as needed.
Information for use by an investigation authority
The article outlines essential guidelines for investigation authorities regarding data retrieval from recorders It includes instructions for manufacturing special tools and interface equipment needed for data extraction, as well as procedures for retrieving data from both undamaged and damaged recording media Additionally, it emphasizes the importance of assessing whether the storage medium has been exposed to excessive heat before attempting playback, which could jeopardize data integrity Finally, it specifies the playback equipment necessary for downloading and reviewing recorded data.
Bridge audio specifications
Input interface
The microphones forming the bridge audio data source are to be considered to be parts of the
The connections, signal levels, and impedances of the VDR are determined by the manufacturer For testing purposes, each microphone must be connected using a plug/socket combination, known as a microphone input port.
Reference signal
The manufacturer must specify a reference signal for the microphone input ports, defined as a 1 kHz sinusoidal wave with an amplitude that matches the nominal output from the microphone at a reference level of 85 dB SPL and 1 kHz.
The reference level is established based on a free field environment For microphones intended for console or wall mounting, an additional +6 dB should be added to the standard 85 dB SPL to determine the appropriate wall-mounted reference level.
Audio frequency response
Each bridge area microphone input port must be tested with signal levels of 6 dB and 45 dB below the reference level The frequency should be swept continuously at a maximum rate of 0.1 octaves per second, covering the range from 150 Hz to 6,000 Hz During playback, the signal recovered from the VDR should not fluctuate by more than 6 dB No signals should be applied to other microphone input ports during this process.
Quality index
5.6.4.1 Input channel with a single signal
The recording quality for each microphone input port in the bridge area must be set to an electrical equivalent level of 75 dBA, ensuring it meets or exceeds a speech transmission index quality value of 0.85, as specified in IEC 60268-16.
STIPA method), with no signal being simultaneously applied to other microphone ports
5.6.4.2 Input channel with multiple signals
The recording quality for each microphone port in the bridge area must be set to an electrical equivalent level of 75 dBA This level should not fall below the quality standard associated with a speech transmission index value of 0.60, as outlined in the IEC 60268-16 STIPA method, while ensuring that all other microphone input ports maintain inputs at the same electrical equivalent level.
5.6.4.3 Signal noise level – Signal to no signal
In the absence of a signal at any bridge area microphone input port, the output signal must remain at least 48 dB lower than the output level generated by a reference signal level input This standard applies across the specified frequency band, as outlined in section 5.6.3, regardless of whether the inputs are open or short-circuited Additionally, this performance criterion must be maintained even when out-of-band input signals are present.
Signal noise level – Signal to noise and distortion
To ensure optimal performance, all unused microphone input ports must be short-circuited, resulting in a minimum signal-to-noise and distortion (SINAD) ratio of 24 dB across the specified frequency band This requirement applies to input levels ranging from 0 dB to −20 dB relative to the reference signal level for all microphone input ports.
Ability to handle complex signals
A bridge area microphone input port shall be able to meet the requirement for audio frequency response while 16 sinusoidal signals are applied simultaneously from the following list:
150 Hz, 190 Hz, 241 Hz, 306 Hz, 380 Hz, 491 Hz, 570 Hz, 789 Hz, 1 000 Hz, 1 267 Hz,
1 606 Hz, 2 000 Hz, 2 581 Hz, 3 000 Hz, 4 145 Hz and 5 000 Hz
NOTE This requirement demonstrates that the audio system will be capable of reproducing a voice in the presence of background noise.
Suppression of low frequency out band noise
The bridge area microphone input ports shall be able to operate according to this standard while a 20 Hz sinusoidal signal with amplitude 19 dB above the reference signal level is present
NOTE This requirement is to demonstrate that the audio system can suppress low frequency noise from 60 Hz and below which might otherwise cause clipping.
Microphones
5.6.8.1 Audio noise level – Signal to noise and distortion
The reproduced signal to noise and distortion (SINAD) ratio must be a minimum of 24 dB when the microphone is tested with input levels of 85 dB at frequencies of 500 Hz, 1,000 Hz, and 2,000 Hz.
SPL, 75 dB SPL and 65 dB SPL This performance shall be achieved while a 20 Hz sinusoidal signal with amplitude 19 dB above the reference signal level is present
The signal recovered from the VDR must maintain a variation of no more than 12 dB during playback within the frequency range of 150 Hz to 6,000 Hz, relative to the average value in this range This requirement should be met while a 20 Hz sinusoidal signal, with an amplitude 19 dB above the reference signal level, is simultaneously present.
Communications audio
Input interfaces
The audio connection to the specified VHF equipment must comply with IEC 61097-7 standards For testing purposes, this connection will utilize a plug/socket combination known as the input port.
Reference signal
The reference signal level for both transmitted and received communications audio is defined as 0,775 V r.m.s.
Audio frequency response
When a signal level is set at 6 dB below the reference for the VHF radio communications input of the VDR, and the frequency is swept continuously at a maximum rate of 0.1 octaves per second from 150 Hz to 3,500 Hz, the playback signal recovered from the VDR must not fluctuate by more than 6 dB.
Quality index
The recording quality for VHF radio communications must meet or exceed a speech transmission index (STI) value of 0.75, as specified by the IEC 60268-16 STIPA method.
Audio noise level – Signal to no signal
In the absence of a signal at the VHF radio communications port, the output signal must be at least 48 dB lower than the level generated by an input that matches the reference signal level.
The requirement must be fulfilled throughout the frequency band specified in section 5.7.3, with the input port in both open and short-circuited states This performance must be maintained in the presence of out-of-band input signals and at the reference signal level.
Signal noise level – Signal to noise and distortion (SINAD)
The reproduced SINAD ratio shall be at least 24 dB across the frequency band as defined in
5.7.3 and with input levels in the range of 0 dB to −20 dB relative to the reference signal level.
Screen image capture
Input interface
5.8.1.1.1 Buffered radar display video output
The VDR can connect to a buffered video output from the display it records, provided it meets the requirements of section 6.2.4 Buffered outputs must comply with the electrical specifications of VESA DMT, which applies to display monitors with screen resolutions ranging from 640 × 350 to 1,280 × 1,024 and refresh rates within the specified limits.
60 Hz and 85 Hz and 1 600 × 1 200 with a refresh rate of 60 Hz
Where the VDR is capable of being connected to a LAN interface this shall be done according to IEC 61162-450 and/or according to IEC 62388:2007, Clause H.2
NOTE 1 IEC 62388:2007, Clause H.2 is provided for compatibility with older display equipment IEC 61162-450 is recommended for new display equipment
Image data shall be provided to the VDR in one of the following formats:
".bmp" – (Microsoft GDI – Bitmap reference);
NOTE 2 The bmp format image file is efficiently reduced by zip compression
".jp2" – (JPEG 2000 – ISO/IEC 15444 in a lossless format)
In order to satisfy the subjectively lossless playback requirement of 5.8.2.2, the received jpg file shall be fully recoverable at the playback suite (Annex C)
NOTE 3 IEC 62388 and IEC 61162-450 require that image quality complies with the subjectively lossless requirement of 5.8.2.2
The VDR shall record a series of single and complete screen image frames One complete screen image frame shall be acquired from each display at intervals of 15 s or less
For each class categorized as "Xband," "Sband," and "ECDIS" (refer to Annex E), an image must be stored at intervals not exceeding 15 seconds The latest image from each location will be sequentially saved, ensuring that each individual image is recorded only once in the final recording medium.
If the “Active” status for a location is indicated as “standby” it shall record this image at an interval not less than 10 min and not exceeding 30 min.
Image outputs
When used with the playback system, the resolution of the output image shall be equal to or greater than the resolution of the image input
The recording must be subjectively lossless, based on the objective tests outlined in sections 6.2.4.1 to 6.2.4.6 Furthermore, the playback system's screen display should provide a subjectively satisfactory representation
Radar data – Post-display selection
Images of the screen must be captured from each display showing the two radars mandated by SOLAS as per section 5.8 Additionally, the identity of the display used for capturing the image must be documented following the procedures outlined in Annex E.
When a radar required by SOLAS is displayed on multiple screens, the images must be recorded in a selective sequence to ensure that each display is recorded at the same frequency, with at least one image captured per interval If it is unclear which images feature the SOLAS-required radars, all images must be recorded.
NOTE In the case of a ship fitted with an INS, ‘radar display’ signifies ‘collision avoidance task and functions display’.
ECDIS data
The screen image shall be captured from each display that is showing the navigation ECDIS required by SOLAS according to 5.8 using only a LAN display video output as described in
5.8.1.1.2 The identity of the display from which the image was captured shall be recorded by the method described in Annex E
Where it is not possible to determine which images contain the navigation ECDIS required by
SOLAS, all images shall be recorded (see 5.8.1.1.4)
NOTE In the case of a ship fitted with an INS, ‘ECDIS display’ signifies ‘route monitoring task and functions display’
The cell name, edition number and update number of the currently displayed cells shall be recorded by the method described in Annex G.
Configuration data
Distribution of data in final recording media
The complete configuration data shall be downloadable from each item of the final recording medium.
Protection
The configuration data shall be protected against unauthorised change, for example through the use of a key, password or similar means.
Synchronisation of sensor and configuration data
To ensure accuracy, any changes to configuration data must include a method for applying the current configuration to each sensor data item at the time it was recorded.
Operational performance test
The VDR installation will conduct operational performance tests on each connected sensor to verify that the sensor data is accurately received, interpreted using the configuration data, and effectively displayed as information.
• initiation of the bridge audio microphone test on demand,
• qualitative evaluation of recently recorded data, excluding bridge audio
The VDR installation must specify the total hours of data stored for each component of the final recording medium, along with the minimum compliance periods as outlined in section 4.5.4.
Bridge alert management system
The VDR shall output alerts to a bridge alert management system if fitted
6 Methods of testing and required test results
General
Test setup
This Clause defines the equipment under test (EUT) as encompassing all components of a shipborne VDR configuration, which includes IEC 61162 ports, microphones with self-test devices, communications audio input units, screen image capture input units, control and display units, the final recording medium, power supply units, playback equipment, items necessary for operational performance testing, and any additional items specified by the manufacturer, along with the manufacturer's documentation.
The EUT must be installed in the test facility with interconnection and input cabling that reflect a typical installation; however, this cabling and installation should not be regarded as part of the EUT itself.
NOTE Where an external computer is required to perform the operational playback test, this does not form part of the EUT
For all general performance tests and checks, unless specified otherwise for individual tests, the following guidelines apply: Test data streams for audio and radar inputs must be selected to effectively evaluate the data processing methods, and a copy of the data set should be preserved for future comparison.
To ensure optimal performance, the maximum number of microphones recommended by the manufacturer should be connected to the Equipment Under Test (EUT) Each microphone input port must receive audio signals primarily composed of speech, presented at an approximate level of 75 dBA A single loudspeaker can be utilized for this purpose.
The manufacturer specifies that the maximum number of audio communication inputs must be connected to the Equipment Under Test (EUT) Each input should receive audio signals that primarily consist of speech.
• Screen image data – test signals equivalent to the maximum number of parallel recorded screen images as specified by the manufacturer shall be presented to the EUT
To ensure proper functionality, each IEC 61162 input port must receive a continuous stream of representative data signals composed of appropriate IEC 61162 sentences Additionally, it is essential to maintain a timed log of the input data for effective comparison purposes.
The recorded data must be reviewed with playback equipment to ensure continuous and consistent recording in line with the standard input data Detailed examinations should be conducted throughout the specified recording duration.
Examinations of 25 random samples of 30 s duration shall be made on all data channels throughout the duration of the recording
A qualitative assessment will be conducted at the beginning of the check on each data channel, followed by an analysis of 10 random samples, each lasting 30 seconds, as deemed suitable for the specific test.
Download and playback equipment
6.1.2.1 Recording and saving of data
The manufacturer must prove to the testing authority that data stored on each item of the final recording medium can be downloaded from any item within the timeframe specified in Annex C and successfully reproduced using the provided playback software.
Data and configuration records for a user-defined period will be downloaded from the specified final recording medium All operational performance test records will be included in the download, and the start and end points, as well as the completeness of the data, will be verified.
The manufacturer must prove that the configuration data has been accurately utilized to interpret the recorded sensor data, including aspects such as the location and status of fire doors, conversion into engineering units and quantities, and identification of the data source.
The equipment shall demonstrate that configuration data contemporaneous with each data item of sensor data is downloadable from each item of the final recording medium.
Sequence of tests
Except where specifically stated otherwise, the tests shall all be conducted on a single EUT but may be performed in any sequence agreed between the manufacturer and the test authority.
Requirements to be checked by inspection only
The testing authority will verify compliance with all requirements outlined in Clause 4 and Clause 5 by inspecting the EUT, manufacturing drawings, and relevant documentation provided by the manufacturer This inspection will encompass various items, including resistance to tampering as specified in sections 4.3.4.1.4, 4.4.3, and 5.2.3 The findings of this inspection will be documented in the test report.
Particular reference shall be made to the following:
1) access to any physical part of the system except the data output interface shall require the use of tools or keys;
2) any access to the final recording medium shall leave easily recognisable evidence of tampering, e.g seals or stickers, etc.;
3) operation of any controls or keyboard keys, or any combination of these, shall not affect recording;
4) termination of recording shall only be possible by means of a key or other secure method;
5) recorded data shall be protected against unauthorised access by use of a password b) Access to data in a capsule (see 4.3.4.3) c) Marking (see 4.3.4.4) d) Performance test (see 4.3.6) e) Selection of data items (see 4.4.1) f) Power source (see 4.5.2) g) Long term retention (see 5.4.1) h) Documentation (see 5.5).
Environmental test conditions for normal operation
The special conditions and tests for survival of data after an incident are given in 6.1.13 and
The manufacturer shall determine which components of the VDR system will be protected or exposed, as defined in IEC 60945
Prior to and after detailed tests, the equipment shall be subjected to a series of performance checks to demonstrate that it satisfies the relevant requirements of IEC 60945
To comply with IEC 60945, it is essential to verify that the battery of the dedicated reserve power source meets the requirements outlined in sections 4.5.3 and 6.1.7, either through testing in the EUT or separately, particularly at the extreme operating temperatures.
Recording duration
6.1.6.1 Test method for fixed and float-free recording medium
The equipment shall operate continuously using normal external electrical power, recording test signals specified in 6.1.1.2 for a duration in excess of 48 h
By a series of performance checks recording shall be demonstrated to be continuous in compliance with the requirements of 4.5.4
6.1.6.3 Test method for long-term recording medium
The manufacturer is required to provide a long-term storage medium that is fully loaded with recorded data, ensuring a continuous record of the signals outlined in section 6.1.1.2 for at least the minimum duration specified in section 4.5.4 Additionally, the equipment must function continuously with standard external electrical power while recording the specified test signals.
6.1.1.2 for a duration in excess of 48 h
By a series of performance checks recording shall be demonstrated to be continuous in compliance with 4.5.4.
Reserve power source
During the operation of the EUT with standard external electrical power and while recording test signals as outlined in section 6.1.1.2, the power must be disconnected for more than 2 hours After this duration, the normal external electrical power should be restored for 10 minutes before concluding the test.
A caution shall be generated when the normal external electrical power is removed
The EUT shall continue to operate from its reserve source of power for 2 h and shall then terminate automatically in accordance with 4.5.3
After the restoration of normal external electrical power, it is essential to verify through performance checks that the Voyage Data Recorder (VDR) resumes its normal operation Additionally, it must be confirmed that the final recording medium retains 45 hours and 50 minutes of recordings from the 48 hours preceding the power interruption, along with 2 hours of bridge audio recordings and 10 minutes of standard recordings.
Recharging of reserve source of power
On completion of the test of 6.1.7, normal external electrical power supply shall be maintained for a continuous period of 10 h Test 6.1.7 shall then be repeated
It shall be demonstrated that the reserve source of power was recharged sufficiently to operate the equipment for 2 h, as specified in 6.1.7.2.
Brief interruption of electrical power
The test of 6.1.7.1 shall be repeated, but normal external electrical power shall be restored after a period of 3 min instead of 2 h
After the restoration of normal external electrical power, the alert behavior of 6.1.7.2 must be demonstrated through performance checks These checks should confirm that the VDR resumes normal operation within one minute of power restoration, retains at least 47 hours and 45 minutes of recording from the final recording medium in the 48 hours prior to the power interruption, and continues to record bridge audio during the power interruption.
Recording integrity
For each of the following it shall be demonstrated that a caution is activated a) Power supply
Whilst operating using normal external electrical power, this power shall be removed
NOTE This test is included in the tests of 6.1.7, 6.1.8 and 6.1.9 b) Record function error
The manufacturer must show that any issues with the accurate recording of test data signals—such as screen images, audio, and data—on the final recording medium are clearly identified by a caution label on the affected item.
The manufacturer shall demonstrate by documentary evidence that the bit error rate for data recording does not exceed 1 in 10 8 c) Microphone functionality
The manufacturer shall demonstrate that there is an unobtrusive acoustic test of all microphones and that, when a microphone malfunction is detected, a caution is activated
The acoustic test shall occur automatically at least once every 12 h and be executable on demand d) Final recording medium capacity
It shall be demonstrated that three independent cautions are generated, one for each element of the final recording medium.
Maintenance of sequential records
The manufacturer shall demonstrate that the VDR maintains sequential records as required by
Co-relation in date and time
The VDR shall record the test data set of 6.1.1.2 for a period of 30 min This recorded data shall be replayed
The time indices of the replayed data shall meet the requirements of 4.3.3 and 5.1.
Design and construction of the float-free capsule
The manufacturer shall determine which components of the VDR system will be protected or exposed, as defined in IEC 60945
Prior to and after detailed tests, the equipment shall be subjected to a series of performance checks to demonstrate that it satisfies the relevant requirements of IEC 60945
To comply with IEC 60945, it is crucial to verify that the battery of the dedicated reserve power source meets the requirements outlined in sections 4.5.3 and 6.1.7, either through testing in the EUT or separately, particularly at the specified extreme operating temperatures.
6.1.6.1 Test method for fixed and float-free recording medium
The equipment shall operate continuously using normal external electrical power, recording test signals specified in 6.1.1.2 for a duration in excess of 48 h
By a series of performance checks recording shall be demonstrated to be continuous in compliance with the requirements of 4.5.4
6.1.6.3 Test method for long-term recording medium
The manufacturer is required to provide a long-term storage medium that is fully loaded with recorded data, ensuring a continuous record of the signals outlined in section 6.1.1.2 for at least the minimum duration specified in section 4.5.4 Additionally, the equipment must operate continuously with standard external electrical power while recording the specified test signals.
6.1.1.2 for a duration in excess of 48 h
By a series of performance checks recording shall be demonstrated to be continuous in compliance with 4.5.4
During the operation of the EUT with standard external electrical power and while recording test signals as outlined in section 6.1.1.2, the power must be disconnected for more than 2 hours After this duration, the normal external electrical power should be restored for 10 minutes before concluding the test.
A caution shall be generated when the normal external electrical power is removed
The EUT shall continue to operate from its reserve source of power for 2 h and shall then terminate automatically in accordance with 4.5.3
After the restoration of normal external electrical power, it is essential to verify through performance checks that the VDR resumes its normal operation Additionally, it must be confirmed that the final recording medium retains 45 hours and 50 minutes of recordings from the 48 hours preceding the power interruption, along with 2 hours of bridge audio recording and 10 minutes of standard recording.
6.1.8 Recharging of reserve source of power
On completion of the test of 6.1.7, normal external electrical power supply shall be maintained for a continuous period of 10 h Test 6.1.7 shall then be repeated
It shall be demonstrated that the reserve source of power was recharged sufficiently to operate the equipment for 2 h, as specified in 6.1.7.2
6.1.9 Brief interruption of electrical power
The test of 6.1.7.1 shall be repeated, but normal external electrical power shall be restored after a period of 3 min instead of 2 h
After the restoration of normal external electrical power, the alert behavior of 6.1.7.2 must be activated It is essential to verify through performance checks that the VDR resumes normal operation within one minute of power restoration Additionally, it should be confirmed that at least 47 hours and 45 minutes of recording from the final recording medium has been retained from the 48 hours preceding the power interruption, and that bridge audio recording continued uninterrupted during the power outage.
For each of the following it shall be demonstrated that a caution is activated a) Power supply
Whilst operating using normal external electrical power, this power shall be removed
NOTE This test is included in the tests of 6.1.7, 6.1.8 and 6.1.9 b) Record function error
The manufacturer must show that any issues with the accurate recording of test data signals—such as screen images, audio, and data—on the final recording medium are clearly identified by a caution label on the affected item.
The manufacturer shall demonstrate by documentary evidence that the bit error rate for data recording does not exceed 1 in 10 8 c) Microphone functionality
The manufacturer shall demonstrate that there is an unobtrusive acoustic test of all microphones and that, when a microphone malfunction is detected, a caution is activated
The acoustic test shall occur automatically at least once every 12 h and be executable on demand d) Final recording medium capacity
It shall be demonstrated that three independent cautions are generated, one for each element of the final recording medium
The manufacturer shall demonstrate that the VDR maintains sequential records as required by
6.1.12 Co-relation in date and time
The VDR shall record the test data set of 6.1.1.2 for a period of 30 min This recorded data shall be replayed
The time indices of the replayed data shall meet the requirements of 4.3.3 and 5.1
6.1.13 Design and construction of the fixed protective capsule
In the context of these tests, "the EUT" refers to the complete protective capsule with all internal fittings and heat insulators, the final recording medium installed within the capsule, any power supply units or batteries included, all mounting hardware and release mechanisms, an acoustic beacon or a mechanically equivalent dummy, and the standard electrical or other cables used for data transfer between the VDR's main units and the fixed recording medium during normal operation.
6.1.13.2 Test data to be pre-loaded into the fixed recording medium
Test data signals as specified in 6.1.1.2 shall be recorded for 48 h
The EUT must undergo a series of tests, specifically 6.1.13.4 to 6.1.13.8, in the following sequence: a) shock testing, b) penetration testing, c) low temperature fire testing, d) high temperature fire testing, and e) deep-sea pressure and seawater immersion testing.
These tests shall normally be carried out on a single EUT If more than one EUT is used, the following sequences are acceptable:
If two EUTs are used the sequence of tests shall be: a), b) on one unit and c), d), and e) on the other, or a), b), c), and e) on one unit and a), b), d), and e) on the other
If three EUTs are used the sequence of tests shall be: a), and b) on one unit, c), and e) on the second unit, and d), and e) on the third unit
As a minimum, the fire test and the deep-sea immersion tests shall be conducted on the same
EUT However, it is not a mandatory requirement that a single EUT shall survive the other tests in addition to these
The deep-sea immersion test may be conducted solely on the final recording medium in the Equipment Under Test (EUT), provided it is demonstrated that the final recording medium remains undamaged despite the potential collapse of the protective capsule.
The EUT shall be secured to the test rig in accordance with the manufacturer’s normal installation instructions
The test requirements outlined in Clause 11 of IEC 60068-2-27:2008 specify a half sine pulse shape with tolerances as shown in Figure 2, and a severity of 50 g for a nominal pulse duration of 11 ms The testing will be conducted on three axes, with the device mounted according to the manufacturer's specified shipboard installation arrangements A total of three shocks will be applied in two directions on each axis, with no pre-conditioning or recovery required Initial and final measurements, as well as acceptance and rejection criteria, are detailed in sections 6.1.3 and 6.1.13.8, along with the functional performance test and operating modes monitoring.
The EUT shall be secured to the test rig in accordance with the manufacturer’s normal installation instructions
The protective capsule shall be subjected to the requirements of EUROCAE 2-4.2.2 of ED-112
The mass used shall be 250 kg, with a pin diameter of 100 mm, dropped from a height of 3 m
The protective capsule shall be subjected to a low temperature fire test for 10 h at 260 °C and a high temperature test of 1 h at 1 100 ºC to the requirements of EUROCAE ED-112
NOTE If an actual acoustic beacon is used during the test, caution is recommended due to possible explosion of the battery
6.1.13.7 Deep-sea pressure and sea water immersion
The protective capsule shall be subjected to the requirements of EUROCAE 2-4.2.6 of ED-112
Both the 6 000 m 24-h test described in paragraph 1 and the 3 m 30-day test described in paragraph 2 shall be carried out
After completion of the test sequences, all the release mechanisms shall function according to the appropriate specifications
After testing, data retrieval must follow the manufacturer's instructions, which may involve error correction Repairs to the final recording medium are restricted to connectors and cables For playback, the recording medium can be transferred from the Equipment Under Test (EUT) to standard replay equipment provided by the recorder manufacturer Recordings must comply with the performance test specifications outlined in section 6.1.1.3, ensuring at least 99% of the data is recoverable Any thermal, mechanical, or corrosive damage to the recording medium during testing that leads to data loss will be considered a failure.
The under water locator beacon need not survive the fire tests, but shall remain attached to the protective capsule throughout
The acoustic beacon shall be tested for compliance with SAE AS 8045A
6.1.14 Design and construction of the float-free capsule
6.1.14.1 Definition of EUT for this subclause
For the purpose of these tests, "the EUT" refers to the complete float-free recording medium with all internal fittings, the final recording medium as installed in the capsule, any power supply units or batteries included in the capsule, all mounting hardware and release mechanisms, including the automatic release mechanism, and the standard electrical or other cables used for data transfer between the VDR's main units and the final recording medium during normal operation.
6.1.14.2 Test data to be pre-loaded into the final recording medium
Test data signals as specified in 6.1.1.2 shall be recorded for 48 h
The EUT shall be subjected to the tests of IEC 61097-2, as relevant, followed by 6.1.14.4, and in any order, 6.1.14.5 and 6.1.14.6
6.1.14.4 Data integrity under float-free operation
The EUT will undergo testing to ensure that the data stored until the capsule's release remains intact, unaffected by the capsule's deployment or the transmission of locating and homing signals Performance checks will be conducted on the capsule following its release, across various deployment scenarios.
– having been manually released after manually set to the transmission mode;
– having been manually released without being set to the transmission mode;
– with different sequences of disconnecting data and power inputs, if relevant
The tests outlined in IEC 61097-2 can be integrated with these checks The Equipment Under Test (EUT) must be configured to transmit data in a test mode, ensuring it is securely positioned to avoid detection by Search and Rescue (SAR) facilities and not placed in water, simulating the worst-case scenario The beacon must continuously transmit for a duration of 7 days.
After testing, data retrieval must follow the manufacturer's instructions, which may involve error correction Repairs to the recording medium are restricted to connectors and cables, while any mechanical or corrosive damage that leads to data corruption or loss is considered a failure For playback purposes, the recording medium can be transferred to standard replay equipment provided by the manufacturer It is essential that recordings comply with the performance test specifications outlined in section 6.1.1.3, ensuring that at least 99% of the data is recoverable.
The radio transmitter and light shall be tested for compliance to the appropriate parts of
IEC 61097-2 and IMO A.662(16), but with a required duration of seven days
6.1.14.7 Means to facilitate grappling and recovery
The float-free capsule shall be checked visually for means to facilitate grappling and recovery
Check that the design of the means to facilitate grappling and recovery does not increase the risk of fouling during release, and that the documentation contains appropriate installation instructions.
Operational performance test
Conduct the bridge microphone test as specified in section 6.1.10 c) and verify that the Equipment Under Test (EUT) accurately indicates and identifies the results for each configured bridge audio microphone, such as a failure for the conning position microphone.
Repeat the above with each microphone disconnected in turn
The configuration data within the EUT shall correspond to the standard input data (see
The EUT must accurately confirm and identify using the configuration data, providing a recent image from each connected display if received within the last minute; otherwise, it should indicate that no image has been received Additionally, it should report on every other configured device in accordance with the IEC 61162 series data.
• whether the device has communicated in the last minute
• the most recent received parameter values after conversion to operational values using the configuration data
Repeat the above with a selection of devices disconnected or removed from the IEC 61162 data input
The data storage duration for each element of the final recording medium must be accurately reported in hours, ensuring that the minimum compliant period for each element is clearly indicated.
Power source
It shall be confirmed that the VDR operates at all times when electrical power is applied.