Tetryon compositor
The tetryon compositor was part of a Romulan-designed cloaking device. Damage to the compositor could prevent the cloak from working.

On orders from Vice Admiral Toddman in 2371, Michael Eddington sabotaged the tetryon compositor on the 's cloaking device, to try and force Benjamin Sisko to abandon his insubordinate mission to rescue Odo. The cloak was disabled, but Sisko resolved the difficulty and was successful in reactivating the cloak, and completing the mission. ()

Spacecraft components