A Vulcan science vessel met by Odo in the Gamma Quadrant in 2369, which agreed to carry the fugitive Croden and his daughter Yareth to safety on Vulcan.
The T'Vran is a Vulcan ship that appears at the end of the episode Vortex. In 2369 Odo is taking the Rakhari prisoner Croden home through the wormhole to face execution, while a vengeful Miradorn raider hunts them.
Croden leads Odo to an asteroid in a nebula, where his daughter Yareth has been hidden in stasis since the rest of his family was killed by the Rakhari authorities. After they escape the Miradorn ship, which is destroyed in the nebula, Odo decides not to hand Croden over.
When the T'Vran hails the runabout, Odo tells its captain that his two passengers are survivors of a wrecked ship and asks her to take them to Vulcan. She agrees and beams them aboard.