Ocean-going fishing vessels are primarily used for commercial deep-sea fishing and processing on the high seas and within the exclusive economic zones of other countries, covering the Pacific, Indian, and Atlantic Oceans, the Bering Sea, and Antarctic waters; Major vessel types include large trawler-factory ships, tuna purse seiners, tuna longliners, squid jiggers, crabbers, and professional refrigerated transport ships, with primary power requirements ranging from 700 kW to 4000 kW; Weichai's compatible engine models include the WH17, WHM200, WH20, WH25, WH28, and S3 series, with fuel types covering diesel and heavy oil.