[Code of Federal Regulations] [Title 33, Volume 3] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR245.5] [Page 345] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER II--CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE PART 245_REMOVAL OF WRECKS AND OTHER OBSTRUCTIONS--Table of Contents Sec. 245.5 Definitions. Abandonment means the surrendering of all rights to a vessel (or other obstruction) and its cargo by the owner, or owners if vessel and cargo are separately owned. Hazard to navigation is an obstruction, usually sunken, that presents sufficient danger to navigation so as to require expeditious, affirmative action such as marking, removal, or redefinition of a designated waterway to provide for navigational safety. Obstruction is anything that restricts, endangers or interferes with navigation. Responsible party means the owner of a vessel and/or cargo, or an operator or lessee where the operator or lessee has substantial control of the vessel's operation. Vessel as used in this part includes any ship, boat, barge, raft, or other water craft.