Appendix 1 - Definitions
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.252(83) - Adoption of the Revised Performance Standards for Integrated Navigation Systems (INS) - (Adopted on 8 October 2007) - Annex - Performance Standards for Integrated Navigation Systems (INS) - Appendix 1 - Definitions

Appendix 1 - Definitions

Added Value The functionality and information, which are provided by the INS, in addition to the requirements of the performance standard for the individual equipment.
Alarm An alarm is the highest priority of an alert. Condition requiring immediate attention and action by the bridge team, to maintain the safe navigation of the ship.
Alert Alerts are announcing abnormal situations and conditions requiring attention. Alerts are divided in three priorities: alarms, warnings and cautions.
Alert announcements Visual and acoustical presentation of alerts.
Alert history list Accessible list of past alerts.
Alert management Concept for the harmonized regulation of the monitoring, handling, distribution and presentation of alerts on the bridge.
Automatic control functions Functions that include automatic heading, and/or track and/or speed control or other navigation related automatic control functions.
Category A alerts Alerts where graphical information at the task station directly assigned to the function generating the alert is necessary, as decision support for the evaluation the alert related condition.
Category B alerts Alerts where no additional information for decision support is necessary besides the information which can be presented at the central alert management HMI.
Caution Lowest priority of an alert. Awareness of a condition which does not warrant a alarm or warning condition, but still requires attention out of the ordinary consideration of the situation or of given information.
Collision avoidance The navigational task of detecting and plotting other ships and objects to avoid collisions.
Consistent common reference system (CCRS) A sub-system or function of an INS for acquisition, processing, storage, surveillance and distribution of data and information providing identical and obligatory reference to sub-systems and subsequent functions within an INS and to other connected equipment, if available.
Consistent common reference point (CCRP) The Consistent Common Reference Point (CCRP) is a location on own ship, to which all horizontal measurements such as target range, bearing, relative course, relative speed, closest point of approach (CPA) or time to closest point of approach (TCPA) are referenced, typically the conning position of the bridge.
Degraded condition Reduction in system functionality resulting from failure.
Essential functions Indispensable functions to be available as required for the relevant operational use.
Essential information Indispensable information to be available as required for the relevant functions.
External safety related messages Data received from outside of the ship concerning the safety of navigation, through equipment listed in SOLAS chapter V and/or Maritime Safety Information messages.
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 factor Workload, capabilities and limits of a user trained according to the regulations of the Organization.
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 system). The interface provides means for input, allowing the users to control the system and output, allowing the system to inform the users.
Indication Display of regular information and conditions, not part of alert management.
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 ship. The INS allows meeting the respective parts of SOLAS regulation V/19 and supports the proper application of SOLAS regulation V/15.
Integrity Ability of the INS to provide the user with information within the specified accuracy in a timely, complete and unambiguous manner, and alerts within a specified time when the system should be used with caution or not at all.
Partial integrations Smaller integrations which are not covering the tasks “route monitoring” and “collision avoidance”.
Man-over-board mode (MOB) Display mode for operations and actions of a ship after a Man-over-board accident happened (release of safety equipment, e.g., life buoy and life belt, performance of a return manoeuvre etc.).
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.
Navigation control data Task that provides information for the manual and automatic control of the ship's movement on a task station.
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 modes Modes of operation depending on the sea area.
Operational/functional modules Modules comprising the operational/functional requirements for navigational systems.
Plausibility of data The quality representing, if data values are within the normal range for the respective type of data.
Route monitoring The navigational task of continuous surveillance of own ships position in relation to the pre-planned route and the waters.
Safety related automatic functions Automatic functions that directly impinge on hazards to ship or personnel, e.g., target tracking.
Search and rescue mode Display mode for operations of a ship involved in search and rescue actions.
Sensor A navigational aid (measuring device), with or without its own display, processing and control as appropriate, automatically providing information to operational systems or INS.
Sensor/source modules Modules comprising the sensor/source requirements.
Ship's primary movement The longitudinal directional, lateral directional and heading-rotational movement of the ship.
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 mariners 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.
Source A device, or location of generated data or information (e.g. chart database), which is part of the INS automatically providing information to INS.
System alerts Alerts related to equipment failure or loss (system failures).
System integrator The organization responsible for ensuring that the INS complies with the requirements of this standard.
System position Position calculated in the INS out of at least two positioning sensors.
Task station Multifunction display with dedicated controls providing the possibility to display and operate any navigational tasks. A task station is part of a workstation.
Track Path to be followed over ground.
Track control Control of the ship movement along a track.
Warning Condition requiring no-immediate attention or action by the bridge team. Warnings are presented for precautionary reasons to make the bridge team aware of changed conditions which are not immediately hazardous, but may become so, if no action is taken.
Watchdog System which monitors the software and Hardware well running at regular intervals.
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.

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