But if the Voyager
could stay ahead of the destruction front at full impulse (Tuvok says he can't escape three waves, in such a way that one gets the impression there was reasonable hope of escaping the one), should these ships not be capable of the same, regardless of distance?
Or is the ca. 500 minutes it takes for a near-lightspeed wave to cross the 60 AU the magical timespan that an average impulse drive takes to accelerate from zero to near-lightspeed? Sounds a bit high, comparing to the accelerations suggested in ST:TMP and perhaps "BoBW".