From an angler’s perspective, sight-fishing for bass or other fish in dingy-water seems like a waste of time. But drop the optics of a high-definition Aqua-Vu camera into the dark abyss and perceptions of water clarity take a surprisingly positive turn. It’s a tantalizing possibility offered by angling electronics guru Dr. Jason Halfen, who frequently fishes dark-water rivers and reservoirs. “Around the country, we have a lot of stained or dirty water and that’s particularly true of the flowages and…