Three quick things come to mind:
- Do the non-catchers have exactly the same goodies on the hooks as the catchers, and are at the same depth?
- Speed does make a difference (and I'm talking tenths-of-MPH / example: .5 mph vs. .9 mph vs. 1.2 mph).
- And as far as "being in sight of one another" really leaves the door wide open on differences of what's under the surface - depth, drops, wood vs. no-wood, etc... A lot of times, they're "right here"; get out of this little zone, and no catchin'
That's just what I've learned over the years. Good Luck.
If I Ain't Crappie Fishin', I'm Thinkin' About It............