USS Enterprise (NCC-1701-F)

In an alternate future timeline, a Federation starship, Enterprise-class explorer, Starfleet registry NCC-1701-F. The seventh Enterprise was commanded by Admiral Jean-Luc Picard, who was later succeeded by Captain William Riker. The vessel was lost with all hands, including Tom Paris, Geordi LaForge and Deanna Troi when the Grigari destroyed Earth in 2388. ("The War of the Prophets" [Pocket DS9 Millennium #2]).

Of course, since the Defiant was returned to its own time and the red wormholes were destroyed, the War of the Prophets will not come to pass and the history which led up to the construction of this vessel is aborted.

In an alternate future timeline in the year 2408, a Federation starship, Starfleet registry NCC-1701-F. Commanded by Commodore Data, the seventh starship to bear the name, with a crew complement of 2,023. ("Imzadi" [Pocket TNG HC]).

The timeline which this ship existed in was replaced by a new one after the 2368 death of Deanna Troi was averted.