A shakedown cruise (also known as shakedown time) was an operation where a new starship and her crew tested its systems. It was usually a routine or even a brief ceremonial "maiden voyage", but could also extend to at least one year. A shakedown could reveal flaws inherent in the vessel's construction, especially in prototypes or new technologies. Among the ships that have had them are the USS Excelsior, USS Enterprise-A, USS Enterprise-B, USS Defiant and USS Enterprise-E.