The USRC Thomas Corwin was a notable revenue cutter built in 1876 by Oregon Iron Works at Albina, Portland, and commissioned in San Francisco in 1877. She was a single-screw, steam-powered topsail schooner with a construction primarily of fir, fastened with copper, galvanized iron, and locust tree nails. Her design featured a clipper bow, a flush deck, a fantail stern, two sail-bearing masts, and a midship pilot house and funnel, characteristic of revenue cutters of her era. Her propulsion was powered by a Scotch marine boiler—the first of its type used by the Revenue Cutter Service—with innovations such as steam jackets on cylinders to reduce condensation. The Corwin's dimensions and displacement were slightly greater than similar Dexter-class cutters, with a reported top speed of approximately 12 knots under sail and about 11.5 knots under steam alone, capable of reaching 13–14 knots under combined power. She was armed at various times with a combination of three-inch breech-loading rifles and Gatling guns, and later Hotchkiss rapid-fire guns. Throughout her 23-year federal career, the Corwin operated predominantly in the Pacific and Arctic oceans, with her home port in San Francisco. She was the first revenue cutter to regularly cruise the Bering Sea and Arctic Ocean, participating in the search for the USS Jeannette, landing scientific parties on Wrangel and Herald Islands, and engaging in various exploration and law enforcement activities, including shelling the Tlingit village Angoon and arresting seal poachers. She played a significant role in Alaska exploration, mapping coal deposits east of Cape Lisburne, and confirming the famine on St. Lawrence Island. She was involved in notable events such as the Angoon Bombardment in 1882 and the rescue of stranded crews. After her decommissioning in 1900, she was sold for $16,500 and continued as a merchant vessel, supporting mineral exploration, passenger transport, and icebreaking operations in Alaskan waters. She was extensively modified, including the addition of a second deck, electric lighting, and increased passenger capacity. Her service extended into the early 20th century, including efforts to navigate through ice-choked waters, and she was involved in attempting to rescue Karluk survivors in 1914. The Corwin's legacy includes several geographic features in Alaska named after her, reflecting her maritime significance in Arctic exploration and coast guard 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.