OziExplorer is indeed a good program, and I use it for driving in Baja,
but I'm not sure I'd recommend it for people who have happily using the
Cap'n, or for that matter, boaters. The Cap'n's claim to fame is real
ease-of-use, making it workable for light computer users. Ozi certainly
can be used for marine navigation, but it's a complex program that
works best for people who like a lot of options and customizability.
And to be clear, it doesn't support vector charts, which I believe was
the original poster's attraction to Fugawi. Also, it does not have the
ability to quilt multiple charts together, a feature available in most
of the big navigation products these days.

I recently played with the trial version of Rose Point Navigation's
Coastal Explorer product, and I was knocked out by it's elegance and
simplicity. And it does use those new, free NOAA vector charts. Worth a
look: www.rosepointnav.com

Aaron Tinling
s/v Sweet Destiny
www.navagear.com