[Wolfman77]

So tachyon could be used for detecting Romulan ships. Sounds ok to me since their clock shifts them slightly out of phase. I remember a couple TNG shows about that. One with Geordi and Roe, and one about Rikers former ship.

How about the Klingon ships, do they work differently? Maybe some kind of exhaust detection would work good for them. Though I'm still not sold on them just thinking exhaust conainment was unimportant.

SJ: I was thinking that if they could store, or block the energy then they should also be able to use some of it for power. Kind of like recycling, to extent the time they could remain cloaked. Not that it means a whole lot as it is sci-fi, but at least then the energy used wouldn't melt them in a calculation (x gigawatts heats up y Kg to Zº in t minutes). The longer they stay cloaked the more they emit, untill it is finally detectable.