SS Tenyo Maru

SS Tenyo Maru (天洋丸, Tenyōmaru) was a Japanese ocean-going passenger liner of the Toyo Kisen Kabushiki Kaisha (Japanese Oriental Steamship Co.; TKK) completed in 1908 by the Mitsubishi Dockyard & Engine Works, Nagasaki, Japan. Its sister ships were SS Chiyo Maru and SS Shinyō Maru (1911). It had accommodation for 275 first-class, 54 second-class, and 800 steerage passengers, and could carry over 8,000 tons of cargo. The steerage class had an opium den for Chinese passengers. The ship had the following dimensions: length overall 575 ft., between perpendiculars 558 ft., breadth 63 ft., depth to shelter deck 46 ft. 6 in., to upper deck 38 ft. 6 in., gross tonnage 14,700 tons; displacement 21,500 tons at 31 ft. 8 in. draught.

The ship's turbines were built by the Parsons Marine Steam Turbine Company, Wallsend, England, in 1907, and were capable of delivering a total 17,000 hp at 270 revolutions per minute. It had three 12-inch hollow-steel shafts, each carrying one propeller, with pitch of 105 inches, diameter of 115 inches. Steam was supplied by 13 cylindrical boilers, working at 180 lb pressure and fired by oil fuel only. The ships attained 21.6 knots on trial and 20 knots on ocean service.