Command XJL was an automatic transporter program code devised by Seska. The command triggered an automatic site-to-site transport that she used to beam herself to another location. This program was similar to one used by Wesley Crusher. (TNG: "The Game")

In 2371, after being exposed as a traitor by Commander Chakotay and Lieutenant Tuvok, Seska managed to escape from the USS Voyager to Maje Culluh's Kazon vessel by using command XJL to beam her off the ship. (VOY: "State of Flux")