We live in a 4-dimentional universe, which allows for a form of "teleportation" known as jumping. Instantaneous travel from one place to another, though it is only as effective as your telescopic and gravitational sensors (about 15 minutes of scanning will allow for a jump to the distance of about 4 lightyears with average sensors). Jumping is untraceable unless you have the coordiantes of their destination and where their ship was at when the calculations were made (coordianates in a jump depend on your position, so if you calculate a jump coordinate and then move the ship 500 meters forward it will jump 500 meters in front of the target unless you have it auto correct).