USS Defiance
From Star Trek: Theurgy Wiki
The USS Defiance was a Federation starship operated by Starfleet in the late 24th century. In 2380 Cameron Henshaw spent her cadet cruise aboard the Defiance as a medical intern before graduating as ensign and transferring to the USS Harbinger.
(It is unknown what class of starship the USS Defiance was but it was likely to be an early 24th century vessel that was being used as a training ship, such as a Constellation, Miranda, or Excelsior Class.)
