On Tue, 31 May 2011 17:23:21 -0400, Wayne B
wrote in rec.boats.cruising:

They look suspiciously like the charts that Maptech used to market
under their name. Are they in BSB format and use some sort of weird
copy/encryption scheme?

afaik, Maptech marketed these charts in the U.S. on behalf of NV.
Yes, they are encrypted, that made the plugin necessary. You may not
be aware that BSB charts are available free of charge only for the US
from NOAA - the rest of the world has to pay substantial money for
charts of their home waters - either to government-owned agencies (via
dealers) or private publishers, who produce their own cartographic
data. So, if you live in the US and sail only on NOAA-charted waters,
praise yourself lucky.

I posted this in the rec groups since they have an international
reader- and writership (oops, a pun!)

Cheers,
U.