The SS Tenyo Maru was a pioneering Japanese ocean-going passenger liner completed in 1908 by Mitsubishi Dockyard & Engine Works in Nagasaki. As the first turbine-powered steamship built for trans-Pacific service, she represented advanced maritime engineering of her time. She measured 575 feet in overall length, with a beam of 63 feet and a depth of 46 feet 6 inches to the shelter deck, and had a gross tonnage of approximately 14,700 tons. The vessel had a displacement of around 21,500 tons at a draught of 31 feet 8 inches. Her propulsion system featured three 12-inch hollow-steel shafts, each fitted with a propeller of 115 inches in diameter and a pitch of 105 inches. Power was supplied by 13 cylindrical oil-fired boilers operating at 180 pounds per square inch, which drove Parsons Marine Steam Turbine Company turbines capable of producing 17,000 horsepower at 270 rpm. This engineering enabled the Tenyo Maru to reach speeds of 21.6 knots on trial and approximately 20 knots during regular ocean service. The vessel accommodated 275 first-class, 54 second-class, and 800 steerage passengers, with the steerage class notably including an opium den for Chinese passengers. Her service history included notable events such as her first arrival in San Francisco on June 30, 1909, marking her as the first turbine-driven steamship to reach the port and a key vessel in bringing Asian immigrants to the United States via Angel Island. Throughout her career, she experienced incidents such as running aground near Shanghai in 1910, which was resolved without serious damage, and surviving a severe storm in 1913 that tore her rails and damaged her gangway. In 1921, she was fumigated after a passenger contracted bubonic plague onboard. She also participated in cultural exchanges, carrying the Japanese Friendship Dolls to San Francisco in 1927. Her later years saw her involved in contraband activities, including a significant opium seizure in 1929. The SS Tenyo Maru was decommissioned and scrapped in 1933, marking the end of a notable chapter in early 20th-century maritime history.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.