noun: (nautical) Abbreviation of ultra large crude carrier. (the largest category of crude carrier or oil tanker) [(nautical) a type of supertanker, the largest class of crude carrier or oil tanker, having a capacity of 320,000–550,000 DWT]
noun: (aviation) Abbreviation of ultra low cost carrier. [(aviation) A type of airline that tries to keep ticket prices as low as possible, by charging for everything, such as checked-in baggage, carry-on baggage, food, beverages, assigned seat numbers, etc.]
