Vessel
Vessel means all types of vessels, whether in existence or under construction, including passenger, cargo and combination passenger-cargo carrying vessels, tankers, towboats, barges and dredges which are or will be documented under the laws of the United States, floating drydocks which have a capacity of at least thirty-five thousand or more lifting tons and a beam of one hundred and twenty-five feet or more between the wing walls and oceanographic research or instruction or pollution treatment, abatement or control vessels, which are owned by citizens of the United States; except that an Eligible Export Vessel will not be documented under the laws of the United States.