On Fri, 18 Aug 2006 22:52:35 GMT, Gary wrote:

For some reason the
geeks that digitized the maps for C-Maps frequently read rocky bottom
symbology as rocks awash and entered that into the digital charts. I
have many examples around the PNW.

I've seen that a few times also but I can always cross check against
the raster charts on the laptop when I need to. The Furuno can also
be ordered with Navionics charts instead of C-Map but I have not yet
seen a good analysis of the pros and cons between them. I agree that
the Furuno hardware, especially the screen, is first rate.

We used C-Map charts in the Bahamas that are identical to the Explorer
chart books, and they were very very good.