In this subchapter—

((1)) “abandon” means to moor, strand, wreck, sink, or leave a barge of more than 100 gross tons as measured under , or an alternate tonnage measured under as prescribed by the Secretary under unattended for longer than forty-five days.

((2)) “barge removal contractor” means a person that enters into a contract with the United States to remove an abandoned barge under this subchapter.

((3)) “navigable waters of the United States” means waters of the United States, including the territorial sea.

((4)) “removal” or “remove” means relocation, sale, scrapping, or other method of disposal.