![USS Enterprise balloon - inflating](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/f/ff/USS_Enterprise_balloon_-_inflating.jpg/revision/latest/scale-to-width-down/180?cb=20061205211051&path-prefix=en)
The decoy in the process of inflating
![USS Enterprise balloon - inflated](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/7/7e/USS_Enterprise_balloon_-_inflated.jpg/revision/latest/scale-to-width-down/180?cb=20061205205207&path-prefix=en)
The decoy fully inflated
A balloon form of the USS Enterprise was an object created by the USS Enterprise's computer in 2270 that was used as both a bluff, and to play a practical joke on some Romulans. It was twenty times the size of a Romulan battle cruiser. (TAS: "The Practical Joker")