|Earth Pre-Federation Database - H.M.S. Enterprize|
|The HMS Enterprize, a British galleon, was a notable Human naval ship to bear the name "Enterprise".
No information on this vessel was given beyond its appearance in the opening credits of Star Trek: Enterprise. That she was British is assumed by her bearing the prefix "HMS". That she was a galleon is evidenced by her depiction.
Historically, the Royal Navy has had two ships named HMS Enterprize (spelled with a 'z'): an 8-gun sloop captured from the Spanish in 1743, and a 10-gun tender later captured by the Americans in 1775. Neither were galleons.
Text from the Memory Alpha, the free Star Trek reference