7 Task and functional requirements for an INS
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) - Module B - Task related requirements for Integrated Navigation Systems - 7 Task and functional requirements for an INS

7 Task and functional requirements for an INS

Parent topic: Module B - Task related requirements for Integrated Navigation Systems

7.1 General

  7.1.1 The configuration of the INS should be modular and task - oriented. The navigational tasks of an INS are classified as “Route planning”, “Route monitoring”, “Collision avoidance”, “Navigation control data”, “Status and data display” and “Alert management”. Each of these tasks comprises the respective functions and data.

  7.1.2 All tasks of an INS should use the same electronic chart data and other navigational databases such as routes, maps, tide information.

  7.1.3 If Electronic Navigational Charts (ENCs) are available, they should be used as common data source for INS.

  7.1.4 Paragraphs 7.2 to 7.5 and 7.7 apply, if the respective task is integrated into the INS

7.2 Task “Route planning”

  7.2.1 ECDIS performance standards related mandatory functions and data

The INS should provide the route planning functions and data as specified in Module A and B of the revised ECDIS performance standards (resolution MSC.232(82)).

  7.2.2 Procedures for voyage planning

The INS should be capable of supporting procedures for relevant parts of voyage planning, as adopted by the Organizationfootnote.

  7.2.3 Additional mandatory functions

The INS should provide means for

  • administering the route plan (store and load, import, export, documentation, protection),
  • having the route check against hazards based on the planned minimum under keel clearance as specified by the mariner,
  • checking of the route plan against manoeuvring limitation, if available in the INS, based on parameters turning radius, rate of turn (ROT), wheel-over and course changing points, speed, time, ETAs,
  • drafting and refining the route plan against meteorological information if available in the INS.

7.3 Task “Route monitoring”

  7.3.1 ECDIS performance standards related mandatory functions and data

 The INS should provide the route monitoring functions and data as specified in Module A and B in the ECDIS performance standards.

  7.3.2 Additional mandatory functions

 The INS should provide capability for

  • optionally overlaying radar video data on the chart to indicate navigational objects, restraints and hazards to own ship in order to allow position monitoring evaluation and object identification,
  • determination of deviations between set values and actual values for measured under-keel clearance and initiating an under-keel clearance alarm, if fitted,
  • the alphanumeric display the present values of Latitude, Longitude, heading, COG, SOG, STW, under-keel clearance, ROT (measured or derived from change of heading),
  • AIS reports of AtoNs,
  • Coastal and NAVAREA navigational warnings,
  • search and rescue (SAR) warnings,
  • Coastal and METAREA meteorological warnings,
  • ice warnings,
  • Maritime Safety Information overlay functions,

 and if track control is integrated into the INS,

  • it should be possible to include the planned track and to provide, monitor and display the track related and manoeuvring data.

  7.3.3 Optional Functions

 For navigational purposes, the display of other route-related information on the chart display is permitted, e.g.,

  • tracked radar targets and AIS targets
  • AIS binary and safety-related messages
  • initiation and monitoring of man-overboard and SAR manoeuvres (search and rescue and man-overboard modes)
  • tidal and current data
  • weather data
  • ice data, and
  • the operator may appropriately filter the display of Maritime Safety Information messages.

  7.3.4 Search and rescue mode

  7.3.4.1 If available it should be possible to select on the route monitoring display a predefined display mode for a “search and rescue” situation, that can be accessed upon simple operator command.

  7.3.4.2 In the search and rescue mode a superimposed graphical presentation of the datum (geographic point, line, or area used as a reference in search planning), initial most probable area for search, commence search point and search pattern chosen by the operator (expanding square search pattern, sector search pattern or parallel track search pattern) with track spacing defined by him should be presented.

  7.3.5 Man-over-board (MOB) mode

  7.3.5.1 If available it should be possible to select on the route monitoring display a predefined display mode for a “man-over-board” situation, that can be accessed upon simple operator command.

  7.3.5.2 In the man-over-board mode a superimposed graphical presentation of a operator selectable man-over-board manoeuvre should be presented.

  7.3.5.3 The man-over-board position should be memorised by a simple operator action.

  7.3.5.4 An urgency manoeuvring procedure should be available at the display taking set and drift into consideration.

7.4 Task “Collision Avoidance”

  7.4.1 Radar performance standards related mandatory functions and data

 The INS should provide the collision avoidance functions and data as specified in Module A and B of the Radar performance standards.

  7.4.2 Additional mandatory functions

  7.4.2.1 It should be possible to present less information of ENC database objects than specified in MSC.232(82) for display base.

  7.4.2.2 Target association and target data integration

 If target information from multiple sensors/sources (radar and AIS; 2 radar sensors) are provided on one task station:

  • the possibility of target association should be provided for mutual monitoring and to avoid the presentation of more than one symbol for the same target,
  • the association of AIS and radar targets should follow the requirements of resolutions MSC.192(79) and MSC.191(79),
  • common criteria should be used for raising target related alerts, e.g., CPA/TCPA.

  7.4.2.3 Target identifier

 For identical targets unique and identical target identifiers should be used for presentation on all INS displays.

 Where a target from more than one source can be presented on one display the identifier should be amended as required. Amended target identifiers should be used for all INS display presentations.

  7.4.2.4 Combined radar signals

 A display may present combined radar signals from more than one radar source. The malfunctions of this additional facility should not degrade the presentation of the radar source selected as primary. The primary and the other source(s) should be indicated as such.

  7.4.3 Optional functions

 Optionally, the following information may be displayed:

  • true scaled ship symbols and CPA/TCPA and bow crossing range (BCR) / bow crossing time (BCT) related to the real dimensions
  • chart data from the common database of INS: traffic-related object layers.

7.5 Task “Navigation Control Data”

  7.5.1 General

 To support the manual and automatic control of the ships primary movement the INS navigation control task should provide the following functionality:

  • display of data for the manual control of the ships primary movement
  • display of data for the automatic control of the ships primary movement
  • presentation and handling of external safety related messages.

  7.5.2 Presentation of navigation control data for manual control

  7.5.2.1 For manual control of the ship's primary movement the INS navigation control display should allow at least to display the following information:

  • under keel clearance (UKC) and UKC profile
  • STW, SOG, COG
  • position
  • heading, ROT (measured or derived from change of heading)
  • rudder angle
  • propulsion data
  • set and drift, wind direction and speed (true and/or relative selectable by the operator), if available
  • the active mode of steering or speed control
  • time and distance to wheel-over or to the next waypoint
  • safety related messages: e.g. AIS safety-related and binary messages, Maritime Safety Information messages.

  7.5.3 Presentation of navigation control data for automatic control

  7.5.3.1 For automatic control of the ship's primary movement, the INS navigation control display should allow at least and as default the display of the following information:

  • all information listed for manual control
  • set and actual radius or rate of turn to the next segment.

  7.5.4 The navigation control data should be presented:

  • in digital and where appropriate in analogue form, e.g., mimic elements, logically arranged on and around a symbolic outline of a ship,
  • if applicable, together with their “set- values”,
  • if applicable and on demand together with a history presentation to indicate the trend of the parameter.

7.6 Task “Alert management”

  7.6.1 Scope, operational requirements and alert-related requirements are specified in Module C of these performance standards.

7.7 Task “Status and data display”

  7.7.1 Mandatory data display functions

 The INS should provide the following data display functions:

  • presentation of mode and status information
  • presentation of the ship's static, dynamic and voyage-related AIS data
  • presentation of the ship's available relevant measured motion data together with their “set - values”
  • presentation of received safety related messages, such as AIS safety-related and binary messages, Application Specific Messages (ASM), Maritime Safety Information messages
  • presentation of INS configuration
  • presentation of sensor and source information.

  7.7.2 Mandatory data management functions

 The INS should provide the following management functions:

  • setting of relevant parameters
  • editing AIS own ship's data and information to be transmitted by AIS messages.

  7.7.3 Optional data display functions

 The INS may provide on demand:

  • tidal and current data
  • weather data, ice data
  • additional data of the tasks Navigation control and Route monitoring and AIS target data.
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