This is only what I've heard about it and seen on photos. I'll verify tomorrow, but apparently decoys are used...but they put them out in a straight line...it's very odd. Like us normal hunters would put them either in a scattered array or at most would but them in a J-hook or V shape. They literally put them in a straight line in rows of 5 to 10. They can be in a rectangle or "v" shape. Very odd. From the sound of it, I think they are able to achieve this because the sea ducks don't get a lot of pressure and they're basically dumb as shite.