Star Trek's main deflector dishes. They never once deflected anything, they just functioned as miscallenous beam emitters that could fire the solution to any problem as a set of different coloured beams.
And, a rare moment where I criticise Farscape, inconsistent alien measurements. The metra, a unit of distance in Farscape, seemed to switch between being roughly equivalent to a metre and being roughly equivalent to a few million kilometres. One episode, Aeryn was on foot, trying to reach a part of a wrecked ship saying she was just 300 metras away from her destination. In another, Braca said to Scorpius "The command carrier [huge starship, battlestar sort of scale] is over a thousand metras away, they'll never reach us in time." Either be consistent or let the translator microbes replace units of measurement with their earth equivalent.