vessel
The term “vessel” includes every kind of water and air craft or other contrivance used or capable of being used as a means of transportation on water, or on water and in the air, as well as any ship, boat, barge, or other water craft or any structure capable of floating on the water.
Source
18 USC § 1081
Scoping language
None identified, default scope is assumed to be the parent (chapter 50) of this section.