5.5.1 Date and time
Date and time, referenced
to UTC, should be obtained from a source external to the ship and an internal
clock should be synchronized with valid date and time data. During times of a
loss of the external source, the internal clock should be used. 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 and continuity sufficient to reconstruct the history of the incident
5.5.2 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.
Speed through the water and speed
over the ground, including an indication of which it is, derived from the ship's
speed and distance measuring equipment, as required by SOLAS regulations.
Heading as indicated by the
ship's heading source.
5.5.5 Bridge audio
Microphones should be
positioned on the bridge covering all work stations as described in MSC/Circ.982
so that conversation is recorded. The recording should be such that, on
playback, a normal speaking voice should provide adequate intelligibility while
the ship is performing its normal operations. This performance should be
maintained at all work stations while there is a single audio alarm anywhere on
the bridge or any noise, including noise from faulty equipment or mounting, or
wind. This should be achieved through the use of at least two channels of audio
recording. Microphones positioned outside on bridge wings, should be recorded on
at least one additional separate channel.
5.5.6 Communications audio
relating to ship operations should be recorded on an additional separate channel
to those referred to in 5.5.5.
The electronic signals of the
main displays of both ship's radar installations as required by SOLAS
regulations. 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.
Where a vessel is fitted with an
ECDIS installation, the VDR should record the electronic signals of the ECDIS
display in use at the time as the primary means of navigation. The recording
method should be such that, on playback, it is possible to present a faithful
replica of the entire ECDIS 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 and in addition the source of the chart data
and the version used.
5.5.9 Echo sounder
The depth information.
This should include, where available, depth under keel, the depth scale
currently being displayed and other status information.
5.5.10 Main alarms
This should include the
status of all mandatory alarms on the bridge1 or as
received from the Bridge Alert Management System, if installed, recorded as
individually identified alarms.
5.5.11 Rudder order and response
include status and settings of heading or track controller, if fitted and
indicate the control station, mode, and power unit(s) in use.
5.5.12 Engine and thruster order and response
This should include the positions of any engine telegraphs or
direct engine/propeller controls and feedback indications on the bridge, if
fitted, including ahead/astern indicators and indicate the control station in
use. This should also include any thrusters if fitted and indicate the control
station in use.
5.5.13 Hull openings status
include all mandatory status information required to be displayed on the
5.5.14 Watertight and fire door status
should include all mandatory status information required to be displayed on the
5.5.15 Accelerations and hull stresses
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
5.5.16 Wind speed and direction
Where a ship
is fitted with a suitable sensor, wind speed and direction should be recorded,
including its true or relative status.
All AIS data should be
5.5.18 Rolling motion
The VDR should be
connected to an electronic inclinometer if installed. The recording method
should be such that the rolling motion can be reconstructed during playback.
5.5.19 Configuration data
In addition to the
data items specified in 5.5.1 to 5.5.18, a data block defining the configuration
of the VDR and the sensors to which it is connected should be written into the
final recording medium during commissioning of the VDR. The data block should be
maintained up to date with respect to the vessel installation. It should include
details on the manufacturer, type and version number of a sensor, the
identification and location of the sensor and the interpretation of the sensor
data. This configuration data should be permanently retained in the final
recording media and protected from modification other than by a duly authorized
person following any change to the configuration.
5.5.20 Electronic logbook
Where a ship is
fitted with an electronic logbook in accordance with the standards of the
Organization the information from this should be recorded.
Resolution A.1021(26), Code on Alerts and Indicators,
2009, table 10.1.1.