I'm sure the developers are aware that OCPN can't deal with C-MAP
Edition 3. There was a thread a few weeks back all about the issue.
What I don't know is whether there is a real appreciation of the scale of the problem. I hope I can explain clearly - Look at the two pictures below. One is C-MAP
Ed3 in Maxsea, the other is C-Map Ed2 in OCPN. Believe it or not this is the same bay. The Ed2 charts have little or no detail.
To compound the problem further, the Ed2 charts for this part of the world deviate randomly from WGS84 datum. Ed3 charts are fine with WGS84.
So, using OCPN with C-MAP Ed3 is not possible and though OCPN does read the Ed2 charts, they are so poor that they are almost useless for navigation