Translux chamber

Translux chambers were used by the Daleks in their flying saucers, to bombard with translux beams whichever Daleks remained invisible beyond the normal timelapse after the saucer broke through the light barrier. (PROSE: Inside a Skaro Saucer ^[+]David Whitaker and Terry Nation, The Dalek World (Dalek annuals, Souvenir Press, 1965).)