WHAT VESSELS MAY BE DOCUMENTED?
A vessel must measure at least five net tons and, with the exception of certain oil spill response vessels, must be wholly owned by a citizen of the U.S.


HOW DO I KNOW IF MY VESSEL MEASURES FIVE NET TONS?
Net tonnage is a measure of a vessel's volume. It should not be confused with the vessel's weight, which may also be expressed in tons. Most vessels more than 25 feet in length will measure five net tons or more. For information about how tonnage is determined, including a web-based interactive form that calculates tonnages, visit the U.S. Coast Guard Marine Safety Center's web site.