The original Defiant-class Defiant was equipped with a cloaking device, initially operated by a Romulan advisor, and then just by members of the regular Starfleet crew.

After its destruction, a second ship (the USS Sao Paulo) from the same class was assigned to DS9 and renamed the USS Defiant, presumably to help prevent confusion among infrequent viewers.

Did the second Defiant have a cloaking device?

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Both the Memory-Alpha and the Memory-Beta page for the USS Sao Paulo say that the ship had a new cloaking device.


In Books One and Two of the duology Star Trek: Deep Space Nine - Avatar, the first books in a series set after "What You Leave Behind", the Defiant was described as having been fitted with a new Romulan cloaking device, the Romulan Senate having recognized the strategic importance of the Defiant as the first line of defense against any future Dominion attack through the wormhole.


Following the war, the Romulan Senate moved to allow the Defiant to keep the borrowed Romulan cloaking device it utilized. Such a move recognized the importance of the vessel, and Deep Space 9, as the first line of defense against further Dominion attacks. (DS9 novel: Avatar, Book One)

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  • 1
    You may have my +1 for finding evidence from the Expanded universe books. Is there any evidence that's from the actual shows? – Valorum Apr 6 '17 at 15:38
  • 3
    No, both quotes state that the Sao Paulo only got its cloaking device after the end of the show. – Raidri supports Monica Apr 6 '17 at 15:47

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