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Bass Frenzy Spurs Spy Gadgets as Fishfinder Makers Sue for Edge

Piloting his 20-foot BassCat over the murky Potomac River, Rick Kortlang had a sweeping view of the bottom: He pointed out a line of rock, with what he said were probably catfish swimming just above. In shallower water, he saw a patch of bait fish, making it a good bet that largemouth bass were lurking.

Kortlang, a 58-year-old retiree, was scouting fishing holes this month with a little help from his fishfinder -- a gadget with global-positioning technology, a clear view of what’s happening in the water around the boat and a price tag of about $1,300.