Do the chart numbers used for CHS digital charts correspond to the CHS paper chart numbers?
The chart numbers listed on the back of CHS CDs correspond to the paper chart numbers for easy reference. However, the actual file numbers for the individual digital charts on a CD may or may not correspond with the paper chart number, depending on whether it is a raster chart or an Electronic Navigational Chart (ENC). The raster chart number is essentially the same as the paper chart number the first four digits match the paper chart number. Our ENCs do not match the paper chart numbers as they follow a separate numbering system for ENCs. If you have purchased a series of ENCs, the back of your ENC CD will indicate the equivalent paper chart numbers for your convenience. The CD also contains a text file which indicates the paper chart equivalents.
