49 U.S.C. § 80301
Definitions
In this chapter—
(1)
“aircraft” means a contrivance used, or capable of being used, for transportation in the air.
(2)
“vehicle” means a contrivance used, or capable of being used, for transportation on, below, or above land, but does not include aircraft.
(3)
“vessel” means a contrivance used, or capable of being used, for transportation in water, but does not include aircraft.
( Pub. L. 103–272, § 1(e) , July 5, 1994 , 108 Stat. 1353 .)