Space II Drives were originally developed on the Planet Salenheim by the mega-corporation better world near the time of the great Salenheim exoduses, although similar technologies were developed throughout the galaxy by other races before and after this event.

Space II drives function of the ability to phase shift themselves and the object containing them to an area of subspace that mirrors our own universe but is vastly contracted, this means that if a vessel travels a distance in this area of subspace named space II it translates to a much greater distance in the standard universe.
For example if a vessel drops to space II and travels one kilometer then phase shifts back to our universe it will have traveled many million kilometers.

The phase shift to space II (commonly called a “jump”) requires the vessel to be already traveling at a fast speed, it has been recorded that 100km/s is fast enough for a safe jump any slower than this runs the risk of complications. The vessel must also be in open space with a large distance between it and any other objects as large amounts of matter (including atmospheres) around will cause an unstable jump that often results in the destruction of the vessel.
Once a vessel has met these criteria it can begin the jump, the drive’s guidance computer will assume controls of the vessel and point it in the direction of the vessel’s final destination (as a vessel can not easily change direction or speed in space II without returning to normal space) and adjust velocity again if the ship has dropped below the safe jump speed. At this point the Drive will initiate the jump by producing a pulse of dark energy around the ship that effectively severs the vessel’s connection to space-time, the vessel will then fly one forwards though this bubble of dark energy out into subspace. To the occupants of the ship at this point their last view of normal space will appear frozen around them and then slowly fade to black. Once the craft has traveled a sufficient distance to arrive at its goal (timed precisely by the drive, an error of a meter in subspace can mean an over shoot of many kilometers) it will fire reverse thrusters to slow itself down, once the vessel drops bellow the speed necessary to stay in subspace they will return to our universe, seeming to just “appear” to an observer.