Furuno FEA-2807 Operator's Manual page 558

Appendix 5: C-MAP CM-93/2 Charts
5. The chart limit boxes are color-coded as follows:
Green The chart is available for use in SENC format. If the source of the chart is an RENC then the chart is
also up-to-date. If the source of the chart is something other than an RENC, then all loaded updates are
included into the SENC.
Orange The chart is available for use in SENC format but the chart is either not up-to-date or has been
cancelled. Either the SENC is from a former edition, the SENC is missing the latest updates or the
chart has been cancelled.
Red If the chart is permit free, you do not have it available for use in SENC format and thus you cannot use
the chart currently.
The chart requires a permit but you do not have the permit for the chart therefore you cannot use the
chart currently.
Blue The chart is available either in ENC format, in SENC format for another software version or in SENC
format for another ECDIS. For example, the chart is blue during SENC conversion and when you
loaded a chart into the ECDIS and the system could not convert the chart into SENC format.
Magenta You have a permit to use the chart, but the chart is not available in SENC format and thus you cannot
use the chart currently.
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