By the time of "", transporter technology has advanced considerably, meaning that accidents are now remote, if not near impossible. In the episode "Realm of Fear", Geordi La Forge states that there have been no more than two or three transporter accidents in the preceding ten years. Reference is also made to the advancement of transporter technology in the same episode, where Chief O'Brien states that each individual transporter pad has four redundant scanners whereby in the event a scanner fails the other three will take over, and that he has never lost anyone having been a transporter operator for over 20 years.