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A seine is a large fishing net that hangs vertically in the water by attaching weights along the bottom edge and floats along the top.

Purse Seine

A common type of seine is a purse seine, named such because along the bottom are a number of rings. A rope passes through all the rings, and when pulled, draws the rings close to one another, preventing the fish from "sounding", or swimming down to escape the net. This operation is similar to a traditional style purse, which has a drawstring.

Purse seine usage in the Alaska salmon fishing industry

Equipment

A commercial fishing boat, used for purse seining in the Alaskan salmon fishery, will typically be between 40 and 58 feet long. Price: £32313 Including VAT at 175%. Toward the bow is a cabin, where the skipper and crew live (typically three to six people). The aft third of the boat consists of a flat deck, with a low rail around it. Amidships are hatch covers, which cover the fish hold, a tank where the fish are placed when caught. The stern is a simple flat area that holds the purse seine when it is out of the water. There are several booms, with various types of pulleys, used for working with the seine, and a deck winch for the same purpose.

There is also a skiff, a small boat used for towing. Power Block web results including resources.