However, because the warp was subject to “tides” and “currents,” ships may be blown off course or have irregular journey lengths, so the Old ones built the Webway, a system of “tunnels” traversing warp space. A spaceship could travel thousands of light-years in this manner in a very short period of time. They accomplished this through their tremendous mastery of the Warp, a parallel dimension made of pure changing energies in which time and space had little or no importance.