| http://www.w3.org/ns/prov#value | - The term ???American vessels??? includes any vessel registered, enrolled, or licensed under the laws of the United States and any undocumented vessel owned or chartered by or made available to the United States or any department or agency thereof and any tug or barge or other watercraft (documented or undocumented) owned by a citizen of the United States used in essential water transportation or i
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