Multiple realities
(covers information from several alternate timelines)

Tomalak's warbird was a D'deridex-class Romulan warbird commanded by Commander Tomalak during the mid-2360s.

In 2366, the warbird was ordered to violate the Romulan Neutral Zone to rescue the crew of the Romulan scout ship Pi, which had crash landed on Galorndon Core. Discovered by the USS Enterprise-D, the warbird stayed in orbit until the rescue was complete. (TNG: "The Enemy")

Later that year, Tomalak may have been in command of the same warbird during events surrounding Alidar Jarok's defection to the Federation. (TNG: "The Defector")

The Star Trek Customizable Card Game gives this ship's name as Deranas.
The Way of D'era RPG sourcebook gave its name as the Terix, while the Starships RPG sourcebook called it the Trennis and gave its registry as IRC 1959.
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