Well I tried to get too fancy the other night.
I tried to go all Tom Clancy and moved my La Class in behind a November nice and slow just to see how close I could get without being detected.
Finally decided to fire at about a mere 700 yards and amazingly my torpedo missed at first and attempted to circle around to reengage.
Problem was I was sitting like an idiot only 700 yards away so when it circled the first thing it spotted was me

.
Oh crap! That's why we don't engage from that close!