It should be of no surprise to anyone that these three factions use similar methods of faster than light the Watcher Commonality and the Angel Federation both are ancient races along with the Aviel and the Warrior Unity was a creation of the first two. Unlike the instant or seemingly instant jump of the Terran’s drive, the tunnel drive as it is called by Terran scientists who have studied it’s functioning works instead by creating a protective graviton wave form in front of the vessel, then a second slightly beyond that which is designed to form what most scientists agree is an artificial Eisenstein-Rosenberg Bridge or as it’s more commonly known a wormhole.
There are several key issues that have to be taken into account with the use of the drive, first it requires a gravitational well to lock onto as an end point, secondly once formed the tunnels destination cannot be changed or at least that used by the Unity, it is believed from various witnesses that the Angel Federation has at least the ability to change the end destination while within the tunnel itself and possibly not require one for a lock, however given the lack of available Angel tech for research this deals primary with Warrior Tech instead.
Despite this drawback however it should be noted that there are several advantages to the drive, it requires only the single generator be present for the creation of the tunnel itself, though the size of the tunnel is dictated by the generating drive, this frees up smaller ships as they do not need the drive itself, it also removes the side effects that plague some of those who use the Terran system.
Finally another aspect of the drive is that it can be shut down before a travelling vessel exits the tunnel itself, this in effect traps the vessel within the narrow pocket of real space that exists around the ship, only the reactivation of the drive or another tunnel travelling close by will interfere with the pocket and drop the vessel back into normal space. It was this method that was actually used by the General Purpose Defence Stations or G stations that went into hibernation and it was not until the finding of a Tunnel capable shuttle by Xin’An and Ju’li of Xin’s world in CE 1982 that the stations began to be removed from the pockets that they had placed themselves into, thus they had remained in a pocket for a period of roughly 18920 years a period which to date is the longest any single object is known to have stayed within the pocket.
In terms of travel time, the actual wormhole typically takes 1 day for every fifty light years of travel that it covers, though there is no ‘exact’ science to the actual calculation and it appears to be a mixture of the local and conditions along with the bridge length, the longest known bridge to date was from the Andromeda Galaxy using a Watcher tech Jump Gate, this bridge was travelled by the Fal’en during their return from exile in CE 1997 and it took only a week of travel time despite being far beyond that distance. The gate that was used was also destroyed in the crossing or at least rendered un-usable. Similar effects are seen around a number of other systems within known space, for example the Earth – Ceti ‘run’ results in a time increase of nearly 100% taking 9.4 hours to travel rather than the 4.8 that other jumps are known to take.