Currently, the majority of sea-going ship's stern bearings are replaced by white metal bearings lubricated with oil, instead of traditional water-lubricated bearings like iron plows and wood. These bearings have a high oil film bearing capacity and excellent lubricating properties, especially their sealing devices effectively prevent seawater and sand from entering the stern shaft tube, resulting in minimal wear. Consequently, the main engine and shafting operate more smoothly and reliably.