NCC 1701 C

Responding to a distress call from the Klingon outpost on Narendra III, which was under attack by the Romulans, this vessel was destroyed. it is believed that during the battle a torpedo explosion opened a temporal rift which sent this vessel twenty-two year into the past. At which time it would have encountered Natasha Yar allowing her to return with it. Thus allowing her to be captured and to give birth to Sela.