In World War Two the Germans came close to finishing an aircraft carrier. They did get the airplanes that would fly from it, the Messerschmidt Bf 109 T. This is the decal sheet for a model of one.
The aircraft carrier was not finished, but the planes were used in combat. One of the unique features was the arrestor hook, seen here.
The special wing flaps helped the aircraft to land in very short distance, useful for aircraft carriers and useful on unimproved airfields in Russia.