Appendix A Alert and Maintenance INFO List A-14
Message Subject Explanation Category
Special condition
area(Two way traffic)
ECDIS Crossing a two-way traffic route.
Warning or caution as selected by user.
Default Setting is Caution.
A
The list of Permanent Information is shown below.
Message Explanation
Chart information not up to date The cell that is not the latest is displayed in the
View (S-57)
Chart license expired(SSE 25) The chart license has expired
Datum of position different from WGS-84. Different geodetic datum and Datum shift not
known occur simultaneously
Datum shift not known Unknown shift amount of RNC chart
Indication of crossing safety contour is Off Safety contour highlight is OFF
Indication of navigational hazard is Off Navigational hazard is OFF
Indication of some prohibited areas or areas with
special conditions is Off
Specific area highlight is OFF
Information overscale When own ship moves to another chart, the
chart is expanded to the double scale or more of
the chart scale
Larger scale ENC available A detail chart is available
Larger scale information available, overscale From the scale described in RNC, the display
scale is larger
Larger scale information available, underscale From the scale described in RNC, the display
scale is smaller
Larger scale RNC available for the area of the
vessel
A cell with a larger scale than the chart displayed
at its own ship position is included. (in ARCS)
No ENC Available Scaling factor/sea area chart to be indicated is
unavailable in ECDIS
No RNC at a scale appropriate for navigation There is no RNC in its ship's position
non-ENC data ENC of non-HO is displayed or ENC of own ship
position is non-HO
Overlapped charts of the same purpose Charts of the same purpose are duplicated
SSE27 Following cells are not up to date The cell that is not the latest is displayed in the
View (S-63)
Standard display is customized Standard display item is displayed OFF
Viewing Does Not Include Current Date View display does not include current date
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