Yeah, imagine BGS like this:
"detected cylon basestar at 5 million kilometers trying to match vector for intercept. Will get within radar range in one week."
"Oh, that's really annoying currently, with the repairs and all. How long can we delay the encounter?"
"With proper manouvering, about two months..."
"make it so!" (oops, wrong show...)
Six months later:
"Cylon Battlestar now on direct intercept vector, entering missile range in 15 hours".
"Ok, as soon as he's in range, fire a volley of 10 nukes!"
15 hours later: "Missiles away, eta about 4 hours."
4 hours later: "missile 2, 3 and 5, direct hits. Enemy disabled."
"Ok, let's have a cup of tea..."
doesn't make for much action in a movie (allthough there could be quite some suspension in the maner of "Das Boot"...)