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All BlueChart g2 cartridges are identified by a
seven-digit ID code. This identification system uses the following
convention:

Region (xx) codes include:
| AE = Asia, East
(Japan, China, Indonesia, etc.) |
AF = Africa |
| AW = Asia, West
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CA = Canada |
| EU = Europe (incl.
all Mediterranean Sea) |
PC = Pacific
Ocean (Australia, New Zealand, etc.) |
| SA = South America |
US = United States
and the Caribbean |
Size of coverage (z) codes include:
| S |
Small |
| R |
Regular |
| L |
Large |
| B |
Bathymetric |
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