Subspace inertial displacement
Subspace inertial displacement was a characteristic of subspace particles.

In 2368, a cloaked fleet of Romulan Warbirds fired tachyons into the tachyon detection grid of Starfleet to sabotage and pass the blockade. The result was a subspace inertial displacement which could be detected by Federation starships like the  under the command of Lieutenant Commander Data. ()

de: Subraumträgheitsverlagerung
Inertial displacement