Project Sign (Starfleet)

Project Sign was a secret Federation organisation that none knew existed and was similar to Section 31 in that it was created to challenge hidden threats to the Federation. However, unlike Section 31, Project Sign was created much later; more specifically during Captain James T. Kirk's first journey into the Mirror Universe. Considering the threats posed by this alternate universe, Starfleet decided to create an organisation that would challenge threats from that universe which has been its sole mission. It was, however, unable to actively engage such a threat as the mirror universe fell under the protection of the Prime Directive.

This changed during rising threats from the mirror universe version of Kirk and the Klingon-Cardassian Alliance which began to increase their efforts at crossing into the standard universe which allowed Project Sign to take a more direct hand in combating this threat by aiding the resistance movements present in the alternate realm.

The full abilities of this secret organisation are not known but they did possess three advanced starships and used a great deal of holographic technology as well as state of the art medical facilities. They also possessed a secret base located at Alpha Centauri.

(Star Trek novels: Dark Victory)