1. fish finder position: the fish finder can accurately detect the position, depth, species and other information of fish. Once the fish is found, it will be judged whether it can be caught completely. If possible, the next tool will be developed.

2. Drive away the fish and make them gather: lure or drive away the fish by sound, light, electricity or air curtain through actions such as sound wave drive away and artificial deterrence, so as to make the fish gather.

3. Formal fishing: After fishing with sound wave drive or pulse current, fishing operations are jointly carried out with nets, gill nets, trawls or purse seines.