In the case of Star Trek at least, I'm not as familiar with published stats as I am with the show itself. Honestly, though? We had real-time conversations with earth from out on the frontier many times in TNG, real-time conversations between Earth and Bajor in DS9, they were even able to arrange real-time communication with Voyager, though for all I know that was a one-shot techno-babble trick that was never mentioned or used again.200.000 c and 8000 ly means 0.04 years, thus roughly two weaks of signal delay. Still a government like that can work (with an even longer delay too, since both the Spanish and British Empire functioned without rapid means of transportation and communication).
Ok, so this is just a stat from a cross-section book, with no context whatsoever? Cause most any weapon used in space will have effectively unlimited range, the important part is how close you have to be to have a realistic chance of hitting the enemy.Page 5 of the Episode III ICS. It's given in the Venator SD entry, under the DBY-287 gunnery section. Logic dictates that later-model SDs are more than likely to have equivalent (or greater!) range.
At ten light minutes, unless you have magic-tech FTL sensors, you are by definition seeing your target not where it is, but where it was ten minutes ago. And unless you have some sort of FTL weapon system, like the hyper-missiles from Dahakverse, your shots will take ten minutes or more to reach the target. So, at a minimum you must predict your enemy's location twenty minutes (from your perspective) in advance. For a an evading target a few hundred meters in size, more than a 150 million km away. At this point you have to ask yourself what a prophet such as yourself is doing as a gunner. Hence my skepticism.
Even if you can travel that much faster than an SOS, that's a hell of an operational tempo. This and the ten light-minute range both seem to assume godly capabilities and competence on the part of the Imperials.Even ignoring the difference between communication and ability to respond, how are subspace comms supposed to help when they are slower than the enemy's ships? Hyperspace travel works out at over 20 million c. Imperial ships could attack a system and be on to the next one before the distress call even got there!