The term Tachyon particle refers to a short-lived vectored phenomenon produced by EM radiation in a vacuum. The Tachyon particle moves faster than light, and as it moves it gives off energy before winking out of existence. The Tachyon particle itself cannot be detected, but the energy trail it leaves is measurable. The lifespan of a Tachyon particle is dependent on the power of the EM radiation that created it. Passive Tachyon sensors allow a ship to detect EM events before encountering the EM radiation. With regard to combat, ships with Tachyon sensors have an immeasurable advantage over ships without.