Vessel to be lightered
Vessel to be lightered means the vessel which transports a cargo of oil or a hazardous material to a place within the marine environment for transfer of that cargo to another vessel for further transport to a port or place subject to the jurisdiction of the United States. The term vessel to be lightered does not include drilling rigs, or offshore supply vessels transferring cargo intended for use as fuel or lubricant aboard the receiving vessel.
33 CFR § 156.205
In addition to the terms defined in this section, the definitions in 154.105 of this chapter apply to this subpart and to subpart C.