We took the electro-shocking boat to a small private lake to see what kind of fish were in it. We used my truck to drag the boat along two miles of cow trails on down a slope to a make shift boat launch. The lake had only largemouth bass, most of which were 11". We did catch a few large fish, one of which was in the process of trying to swallow a bullfrog backwards. Both fish and frog were released unharmed; however, the frog had a few teeth marks on his backside.
Both the bass and the frog are a little stund from the electro-shocker
The booms out infront of the boat are the cathods that send the DC circuit into the water.
You said boat launch. I didn't see one in the pics. 
Very cool 