Unnamed Prometheus class starships

Multiple realities
(covers information from several alternate timelines)

List of unnamed Federation starships of the Prometheus-class.

Vau N'Akat first contact

Prometheus class starship making first contact with Solum

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

Prometheus class at 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")