I ran a 4e campaign for almost two years called Sea of Tears. The idea behind it was that an entire continent had sunk 100 years previously and there were only mountaintops above the waves. Kind of like a D&D Waterworld, without Kevin Costner. Ships and boats were very important, and the surviving halfling population, deprived of their forested lowland hills (or their natural habitat per 4e - rivers) had become the masters of the waves.
I found a folder cache of my stuff from the campaign. I forgot that I had created ship layouts for use with miniatures. Apparently I was pretty proud of them since I pdfed the thee pages of maps and scrawled name all over. I submit them to you for your use in wherever a boat or small ship map would be appropriate. What I did was to print out the maps and glue them to card-stock, then cut them out and had pirate attacks! Follow the link here. Oh, and they look lousy in Google Docs, so after clicking the link, you'll need to click File and then click Download Original, and then open with that Adobe thingy.
(Check out the rest of the Sea of Os'r Project over at the Lands of Ara.)