The term “car boat” can be used either to refer to a boat powered by the engine of a car, or to an amphibious vehicle which can be used as a car or a boat, depending on the conditions. A number of variations on the car boat exist, from high end products produced by specialty manufacturers to versions made at home by hobbyists. One of the most famous examples of a car boat appeared in the James Bond film The Spy Who Loved Me, in which a car which converts into a submarine plays a prominent role.