A boat is not a good place for a laptop.


have a look he

http://www.seapc.se/index.html


I bought a laptop last June ($2800 Toshiba). Had the Sea PC been
available at that time I would have bought one instead. When you are
checking "specs" pay attention to power consumption. Many laptops
today (especially the 17 in. "media centers") draw more juice than a
fridge. Another huge consideration is how well will a laptop hold up
under marine conditions and exposure to moist, salt laden air? The Sea
PC is rated to take a stream from a fire hose. The costs, from what I
have been able to determine are comparable to a high end laptop.
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Another location for low power hig spec. boat PC's is

http://www.mini-itx.com/store/

They are geared to the car PC but you can use on-board equally.
I have no connection with the owners of the link, but am a satisfied
customer.