One of the reasons I really like this sci-fi ship, is because of this reasonably scientific application of space flight, instead of flying around in curves like you see in other shows. No more force-fields, beaming tech, lasers, or aliens. Bullets, bombs, missiles, nukes, armour plating and badass robots.
Well they did have artificial gravity, anti-gravity, FTL drives, AIs, artificial humans, invisible sexy ladies, etc.