The Mackerel Purse-Seine Fishery
Diagram showing the different sections of a purse-seine. The seine is spread around the mackerel school by a boat. These seine boats were rowed before internal combustion engines, and are now powered. Purse seines are used for mackerel and herring.
This image is from G. Brown Goode's The Fisheries and Fishery Industries of the United States,1884-1887, Section V, Plate 59. The book can be found on line at: http://celebrating200years.noaa.gov/rarebooks/fisheries/welcome.html