In the United Kingdom, a wet lease refers to an aircraft lease in which the aircraft is operated under the air operator's certificate (AOC) of the lessor.[19] An arrangement where the lessor provides the aircraft, flight crew and maintenance but the lessee provides the cabin crew is sometimes referred to as a "damp lease", a term especially used in the UK. It is also occasionally referred to as a "moist lease".[2] In the United Kingdom, a dry lease is when an aircraft is operated under the AOC of the lessee.[19]