SS Bonaventure

The USS Bonaventure was an Earth starship, the first equipped with Zefram Cochrane second generation warp engines.

The Bonaventure was lost in the late 22nd century on her third mission. At the time, it was believed that it had suffered a failure due to a design flaw in its warp engines. Cochrane disputed this theory, and the loss of the Bonaventure pushed him to establish the Warp Five Complex. 

In 2269, the USS Enterprise (NCC-1701) discovered the Bonaventure trapped inside a "pocket dimension" in a region known as the Delta Triangle. 

Background
The Bonaventure was established in the TAS episode "The Time Trap", and described as the first Earth ship to have warp drive installed. It was depicted as extremely similar in appearance to the, with a registry of 10281NCC. This would seem at odds with what was later established in the movie Star Trek: First Contact, and by the depiction of the 22nd century in Star Trek: Enterprise.