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One of the tasks assigned Panel M-16 (Modernization of Propulsion Shaft System) of The Society of Naval Architects and Marine Engineers Technical and Research Program, under the guidance of the Ships' Machinery Committee, is the investigation and evaluation of various types of shaft bearings with their related problems under simulated and actual operating conditions. This report, which supplements Bulletin No. 3-12 "Report of Ship Operators' Experience with Stern Tube Bearing Wear," was prepared as a Panel effort to summarize and disseminate information on a ship's operating experience with oil-lubricated stern tube bearings as one phase of this extensive investigation.