7. Task and functional requirements for an INS
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
7.2.2 Procedures for voyage planning
should be capable of supporting procedures for relevant parts of voyage planning,
as adopted by the Organization1.
7.2.3 Additional mandatory functions
The INS should provide means for
- administering the route plan (store and load, import, export, documentation,
- 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
- AIS reports of AtoNs, 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-over-board and SAR manoeuvres (search and
rescue and man-over-board modes)
- tidal and current data
- weather data
- ice data.
7.3.4 Search and rescue mode
22.214.171.124 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.
126.96.36.199 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
188.8.131.52 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.
184.108.40.206 In the man-over-board mode a superimposed graphical
presentation of a operator selectable man-over-board manoeuvre should be
220.127.116.11 The man-over-board position should be memorised by a
simple operator action.
18.104.22.168 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
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
22.214.171.124 It should be possible to present less information of ENC database objects
than specified in MSC.232(82) for display base.
126.96.36.199 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.,
188.8.131.52 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.
184.108.40.206 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"
To support the manual and
automatic control of the ship's primary movement the INS navigation control task
should provide the following functionality:
- display of data for the manual control of the ship's primary movement
- display of data for the automatic control of the ship's primary movement
- presentation and handling of external safety related messages.
7.5.2 Presentation of navigation control data for manual
220.127.116.11 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
- 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,
7.5.3 Presentation of navigation control data for automatic control
18.104.22.168 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, Navtex
- 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
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
1Resolution A.893(21) on Guidelines for voyage planning.