In this chapter—

(1) “abandon” means to moor, strand, wreck, sink, or leave a barge of more than 100 gross tons as measured under section 14502 of this title, or an alternate tonnage measured under section 14302 of this title as prescribed by the Secretary under section 14104 of this title 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 chapter.

(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.