A phase compensator can refer to an engineering tool or a component on Federation starships such as the Intrepid-class. They were also used by the Klingon Empire. A phase compensator was one component of the plasma manifold aboard a Klingon Bird-of-Prey. (DS9: "Return to Grace") During the USS Voyager's maintenance overhaul in 2377, Lieutenant B'Elanna Torres ordered that a new phase compensator be installed on a relay. (VOY: "Nightingale")