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Purse seine nets are now larger and can be hauled by power blocks installed inaluminum purse seine boats. Fewer crewmen are needed to compactthe school, after which the fish are pumped aboard the carrier vessel. (Image credit: NOAA Central Library Historical Fisheries Collection; P. 6 of Our Changing Fisheries 1970 Centenary NMFS centenary volume | Artwork by Bob Hines)