Tadar

Tadar refers to TAchyon Detection And Ranging, derived from Radar, is fictional detection device that is basically a faster than light radar.

Theory
Most of the current detection methods use electro-magnetic waves, which travels at the speed of light, and is not really useful when the distance is too far away, especially in combat. Tadar makes use of Tachyons in a way similar to radar, which emits radio waves and uses the reflected patterns to detect targets, tadar emits tachyons and uses the reflected tachyons to detect targets.

Similar device
Gradar Gravitational-wave detection and ranging

Other Languages
快子雷達