We could do a "pilot visual" bomb in the B-52 but it was a last-ditch procedure. This only works from low altitude with a high-drag (retarded) bomb.
1. Line up on the target at around 500 feet altitude.
2. Your airspeed should be around 360 knots indicated (390 was the limit).
3. About 10 seconds out, open your bomb-bay doors.
4. Looking out the pilot's window, as the target goes under the nose, release your bomb(s). Dropping a whole "stick" would give you a better chance of hitting something.
In reality the pilot would count down "5,4,3,2,1 Hack!" and the Radar-Navigator would drop the bombs. The B-52 pilot has no bomb release.