Appendix 1 – Definitions
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Statutory Documents - IMO Publications and Documents - Circulars - Safety of Navigation - Circular SN.1/Circ.288 – Guidelines for Bridge Equipment and Systems, Their Arrangement and Integration (BES) – (2 June 2010) - Appendix 1 – Definitions

Appendix 1 – Definitions

Cluster Group of functions on a high level, e.g., navigation, automation.
Degraded condition Reduction in system functionality resulting from failure.
Failure analysis The logical, systematic examination of an item, including its diagrams or formulas, to identify and analyse the probability, causes and consequences of potential and real failures.
Human machine interface (HMI) The part of a system an operator interacts with. The interface is the aggregate of means by which the users interact with a machine, device, and system. The interface provides means for input, allowing the users to control the system and output, allowing the system to inform the users.
Integrated navigation system An INS is a composite navigation system which performs at least the following tasks: collision avoidance, route monitoring thus providing "added value" for the operator to plan, monitor and safely navigate the progress of the vessel. The INS allows meeting the respective parts of SOLAS regulation V/19 and supports the proper application of SOLAS regulation V/15.
Integration Combining of data, functions and/or operations to accomplish a high-level aim.
Interfacing Communication between equipment and between equipment and humans.
Multifunction display A single visual display unit that can present, either simultaneously or through a series of selectable pages, information from more than a single function of an INS.
Mode awareness The perception of the mariner regarding the currently active Modes of Control, Operation and Display of the INS including its subsystems, as supported by the presentations and indications at an INS display or workstation.
One equipment concept The equipment which is recognized as one type of equipment by integrating the function of mandatory equipment of SOLAS of a plural number.
Operational/functional module The module specifies the operational and functional capabilities of systems and equipment.
Sensor/source module The module specifies the sensor/source performance of systems and equipment.
Simple operator action A procedure achieved by no more than two hard-key or soft-key actions, excluding any necessary cursor movements, or voice actuation using programmed codes.
Single operator action A procedure achieved by no more than one hard-key or soft-key action, excluding any necessary cursor movements, or voice actuation using programmed codes.
Situation awareness Situation awareness is the mariner's perception of the navigational and technical information provided, the comprehension of their meaning and the projection of their status in the near future, as required for timely reaction to the situation. Situation awareness includes mode awareness.
Task Work to be performed by bridge team and pilot.
Task station Multifunction display with dedicated controls providing the possibility to display and operate multiple tasks. A task station is part of a workstation.
Workstation The combination of all job-related items, including the console with all devices, equipment and the furniture, to fulfil certain tasks. Workstations for the Bridge are specified in MSC/Circ.982.
Parent topic: Circular SN.1/Circ.288 – Guidelines for Bridge Equipment and Systems, Their Arrangement and Integration (BES) – (2 June 2010)
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