Sea Clear II software
I too downloaded SeaClear recently as I was curious how it worked. I think you''ll find any BSB or other raster-type chart to work with it. Or at least that was my experience (with NOS charts) and this is also what the developer promises.
However, I couldn''t get the damn thing to load more than one single chart (file) at a time. I had a CD of Med charts for Spain & Portugal and could get the program to see the list of files ont the CD...but no way to select more than a single file. Very frustrating. Plase let me know if you find the ''trick''!
BTW an email to the developer produced no reply (so far). Free software is of course a small price, and perhaps also represents the level of support one should expect.