I came across this video on youtube that shows the main idea of what I explained earlier as saining. In the video, they obviously have a large boat and a mechanical device pulling in the net, making the guys' job look easy. They are also catching smaller salmon, pink salmon as it says in the description. I could easily say that a pully system would make it a lot easier to pull in king salmon rather than using your bare hands. The video clearly shows how the fish are gathered from the net. With a traditional basket style fish trap it would be a lot easier not having to untangle troublesome salmon from the net.