Multiple realities
(covers information from several alternate timelines)
List of unnamed Federation starships of the Prometheus-class.
Vau N'Akat first contact []
First contact with Solum
This starship made first contact with the Vau N'Akat sometime after 2384 in an alternate timeline. (PRO: "Preludes")
Aaron Waltke has suggested that this is one of the two deep space vessels Starfleet redirected towards the USS Voyager in the Star Trek: Voyager episode "Life Line". [1]
Battle of Procyon V []
A Prometheus-class ship
In an alternate timeline, occurring during the 26th century, this starship participated in the Battle of Procyon V assisting the Federation in defeating the Sphere-Builders. (ENT: "Azati Prime")