: A valid CM93 v2 chart set must contain a root folder with a file named GENCAT.DAT and a series of numerical subfolders. Without GENCAT.DAT , your navigation software will not recognize the database.
In OpenCPN v5.2.0 and later versions, CM93 v2 charts continue to function properly. For bluewater crossings and ocean passages, many experienced sailors still rely on their copy of CM93 v2 charts while using OpenCPN as their primary navigation software.
Elias knew these charts weren't just single files; they were a complex treasure chest of data. He sought out a reliable source—often shared among sailors on forums like the Maritime Forum
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