Division 5.1 Information mode
United Kingdom
- (a)
Information mode shall be used for information only and not for navigation.
- (b)
In information mode all kinds of chart orientation, rotation, zooming and panning are allowed. However, it is recommended to use the same fixed ranges as in the navigation mode and the chart orientation whether:
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to north, or
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to the fairway axis at the actual position, or
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to the actual vessels heading.
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- (c)
It shall be possible to scroll the chart manually on the screen with the fairway axis in line with the vertical screen axis.
- (d)
Inland ECDIS may be connected to a positioning sensor to scroll the chart picture automatically and to display the section of chart matching the actual surrounding, namely in the operator-selected range.
- (e)
Information regarding the position and orientation of other vessels, gathered by communication links like AIS, shall be only displayed if they are up-to-date (nearly real-time) and accurate. If the heading of other vessels is not available, the position and the orientation of those other vessels shall not be presented by:
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a directed triangle, or
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a true outline (to scale).
In this case the usage of a generic symbol is recommended.
The following time out values are recommended (from IEC 62388):
Category of vessel Nominal reporting interval Maximum time out value Nominal reporting interval Maximum time out value class A class A class B class B Vessel at anchor or moored and not moving faster than 3 knots (class B not moving faster than 2 knots) 3 min 18 min 3 min 18 min Vessel at anchor or moored and moving at more than 3 knots 10 s 60 s 3 min 18 min Vessel operating in SOLAS mode, moving 0 to 14 knots 10 s 60 s 30 s 180 s Vessel operating in SOLAS mode, moving 0 to 14 knots and changing course 3 1/3 s 60 s 30 s 180 s Vessel operating in SOLAS mode, moving 14 to 23 knots 6 s 36 s 30 s 180 s Vessel operating in SOLAS mode, moving 14 to 23 knots and changing course 2 s 36 s 30 s 180 s Vessel operating in SOLAS mode, moving faster than 23 knots 2 s 30 s 30 s 180 s Vessel operating in SOLAS mode, moving faster than 23 knots and changing course 2 s 30 s 30 s 180 s Vessel operating in inland waterway mode 2 – 10 s 60 s — — The AIS targets should be marked as outdated if the position information of moving vessels is older than 30 seconds.
Information on the intention (blue sign) or the number of blue cones of other vessels, the status of signals, weather warnings (from Meteoalarm: www.meteoalarm.eu) and the water level received via Inland AIS may be displayed. The information on the intention (blue sign) shall only be displayed on the right side of the symbol, if the heading of the vessel is available. If no heading information is available the information shall only be displayed in a direction independent form.
The following table is providing an example for the display:
Visualisation of Blue Sign status 0 to 2 and dangerous goods Blue sign Not connected or not available Not Set Set Blue cones no 1 to 3 no 1 to 3 no 1 to 3 Heading No Symbol Yes Symbol True shape -
- (f)
Information regarding AIS base stations, AIS Aids to Navigation (ATON) and AIS Search and Rescue Transmitters (SART) may be displayed, if the symbols can be distinguished from other symbols (e.g. symbols 2.10 and 2.11 of IEC 62288 Ed. 2, Table A.2).
- (g)
Information received by an AIS device and required by local police regulations shall be displayed.
- (h)
It shall be possible to display all information transmitted by an AIS on user request.
