Join Date: Oct 2009
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I don't know anything about international registration but I'm guessing it's good for expensive mega yachts as most of them you see are registered offshore.
For the typical boat that most people own, the advantages probably aren't there. In most states, the biggest tax issue in owning a boat is yearly property tax. Unless you move your boat around a lot to stay one step ahead of the tax man, and most of us don't, the local taxing authorities will find you and it doesn't matter whether your boat is documented or not.