Tosaw's "raking" of the river bottom near T Bar could have easily missed a body, a rig, or a canopy. Commercial fishermen often drag grapnels and other snagging devices trying to recover lost gear. Even when the exact GPS position of the lost gear is known, the efforts are often unsuccessful. Grapnels and other snagging devices can bounce over or otherwise fail to hook sought objects on the bottom.
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Login Too bad Tosaw didn't use side scanning sonar gear. Look at how well it images items if the surrounding bottom is uncluttered.
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LoginTosaw's rake had a huge design error in having the tines extend in only one direction. The rake could easily rotate during descent and drag with the tines up. Straight tines with no curve or barb could easily release a snagged object. Also, in this photo, a lot of tines appear to have broken off.
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