| http://www.w3.org/ns/prov#value | - 'No bill of sale, mortgage, hypothecation, or conveyance of any vessel, or part of any vessel of the United States, shall be valid against any person other than the grantor or mortgagor, his heirs and devisees, and persons having actual notice thereof, unless such bill of sale, mortgage, hypothecation, or conveyance, be recorded in the office of the collector of customs where such vessel is regist
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