hypothetically speaking here...

in general...220 genset with about 20' of 10-2 wire with a pug on one end, and then the other end, the wire is spread into a 'y' about 3-5' apart with insulation stripped off the last 6" of the y end. lay the line out inthe water.. throw some chum in the middle of the y... be out of the water!!! as fish take the chum in the 'y'.. hit the power to the plug.. fish float to the top.
I... uh.. have only heard about this of course.. i um.. wouldn't do it myself because it seems a tad dangerous.. and is probably expressly illegal...
soundguy