VS Seleya

The VS Seleya was a Vulcan combat cruiser that was in service with the Vulcan High Command in the mid-22nd century. This ship was under the command of Captain Voris. Its standard crew complement was 147.

History
Before being assigned to the Vulcan Embassy on Earth, Sub-Commander T'Pol was stationed on the Seleya as deputy science officer for over a year; the vessel's chief engineer was Solin. 

In December of 2152, the Seleya embarked on a mission to chart the thermobaric clouds surrounding the Delphic Expanse. After several days, the ship's crew reported that the Seleya was caught in a subspace eddy and being pulled into the Expanse. That was the last transmission ever received from the ship; the Vulcan vessel Vaankara was sent into the Expanse to search for it, but contact with that craft was also soon lost. The final transmission from the Vaankara depicted the crew behaving like animals, and murdering each other. 

In September of 2153, Enterprise discovered the fate of the Seleya; having made it into the Expanse, the ship had entered an asteroid field to mine trellium ore and refine it into trellium-D, with which the ship's crew could line the vessel's hull and be protected against the anomalies generated by the spheres that littered the region. The ship's complement had quickly been driven insane by neurotoxic effects of the trellium, and the ship remained in the field, adrift.

The Seleya was destroyed when Enterprise personnel, including T'Pol, were forced to overload the ship's power grid in order to escape, with the loss of all hands. 

Although information about the Seleya was stored in the Xindi database aboard Enterprise, this was deleted (along with the rest of the database) shortly after the NX-class starship was seized by Triannon fundamentalists, later in 2153. The fact that T'Pol had been exposed to trellium aboard the Seleya led to her becoming addicted to the substance by early 2154. 

Midway through that year, the Vulcan High Command briefly investigated the possibility that Archer had deliberately destroyed the Seleya. Evidence against him included the fact that despite spending several hours in the ship's auxiliary control room, he never attempted to access the internal sensors or download the computer database. He was eventually found innocent, and the High Command saw no reason to investigate the matter further.