46 C.F.R. § 42.05-63 Ship(s) and vessel(s).
Title 46 - Shipping
The terms ship(s) and vessel(s) are interchangeable or synonymous words, and include every description of watercraft, other than a seaplane on the water, used or capable of being used as a means of transportation on water. [CGFR 68–126, 34 FR 9011, June 5, 1969]
Title 46: Shipping
PART 42—DOMESTIC AND FOREIGN VOYAGES BY SEA
Subpart 42.05—Definition of Terms Used in This Subchapter
§ 42.05-63 Ship(s) and vessel(s).