How stupid is this idea? Could it ever work?
Take a look at the boatdesign.net WIKI at:
http://www.boatdesign.net/wiki/Onboard_Computers
There is on ongoing discussion started at:
http://www.boatdesign.net/forums/showthread.php?t=19458

This is mostly aimed at cruising use, with good in-port and at-anchor
capabilities.

When you have some experience with broadband aboard, please drop in
there and share what you've learned! Thanks...