Placing pirate ship in sims 2 Bon Voyage?

So I've been trying to put the pirate ship in one of my lot's backyards, and it won't go in water, it says it must be placed on terrain, but then I try to put in on terrain, and it says it must be placed on a beach. So I'm thinking it has to be on beachfront property, but I can't place my lots that close to the beach... so I can't get it to work. Any suggestions? Why would the ship even be available for sale in residential lots if you can't place it anywhere? Arrr! (hehe, a little frustrated pun :P)