AP-67
Appendix 5:
C-MAP CM-93/2 Charts
A5.1 C-MAP Charts
A5.1.1 Introduction
This electronic chart system is also compatible with C-MAP vector chart format CM-93 charts, available from C-
MAP Norway A/S. This material is used like Hydrographic Offices S57ed3 charts, but it doesn't have ENC status as
defined by IMO, IHO and IEC and thus it cannot be used to replace paper charts.
CM-93 format is encrypted to prevent unauthorised use, therefore the operator needs an authorisation code to view
any CM-93 chart. This authorisation code is entered manually.
Before any CM-93 chart can be used in the ECDIS, it is loaded into your hard disk and converted into the system’s
own internal format (SENC). CM-93 charts can be updated only by loading a newer complete set of CM-93 charts.
CM-93 chart material is stored into two CD-ROMs.
For further details on CM-93 charts, see the chapter on vector chart material.
Note: SENC conversion must be done in the single workstation mode. For how to switch from multi-mode to single
mode, see the procedure in section 18.2 "How to Control Common Reference System". Further, turn the radar
overlay off. See section 23.2 "How to Activate Radar Overlay on the ECDIS" for the procedure.
A5.1.2 S57 chart legend with C-MAP charts
An example of chart legend with C-MAP chart
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