A steamship, often referred to as a steamer, is a type of steam-powered vessel, typically ocean-faring and seaworthy, that is propelled by one or more steam engines that typically move (turn) propellers or paddlewheels. The first steamships came into practical usage during the early 1800s; however, there were exceptions that came before. Steamships usually use the prefix designations of "PS" for paddle steamer or "SS" for screw steamer. As paddle steamers became less common, "SS" is incorrectly assumed by many to stand for "steamship". Ships powered by internal combustion engines use a prefix such as "MV" for motor vessel, so it is not correct to use "SS" for most modern vessels.
SS Carnatic was a British steamship built in 1862-63 by Samuda Brothers at Cubitt Town on the Isle of Dogs, London, for the Peninsular and Oriental Steam Navigation Company (P&O). She operated on the Suez to Bombay run in the last years before the Suez Canal was opened. This route gave a fast, steamship-operated route from Britain to India, connecting with similar steamships running through the Mediterranean to Alexandria, with an overland crossing to Suez. The alternative was to sail round the Cape of Good Hope, a distance at which steam ships were not, in the early 1860s, sufficiently economical to be commercially competitive with sail.
Eureka is a side-wheel paddle steamboat, built in 1890, which is now preserved at the San Francisco Maritime National Historical Park in San Francisco, California. Originally named Ukiah to commemorate the railway's recent extension into the City of Ukiah, the boat was built by the San Francisco and North Pacific Railroad Company at their Tiburon yard. Eureka has been designated a National Historic Landmark and was listed in the National Register of Historic Places on April 24, 1973.
Arthur Foss, built in 1889 as Wallowa at Portland, Oregon, is likely the oldest wooden tugboat afloat in the world. Its 79-year commercial service life began with towing sailing ships over the Columbia River bar, and ended with hauling bundled log rafts on the Strait of Juan de Fuca in 1968. Northwest Seaport now preserves the tug as a museum ship in Seattle, Washington.
SS City of Milwaukee is a Great Lakes railroad car ferry that once plied Lake Michigan, often between Muskegon, Michigan and Milwaukee, Wisconsin. She was built in 1931 for the Grand Trunk Milwaukee Car Ferry Company and is the only pre-1940s ship of this type to survive. She now serves as a museum ship, bed and breakfast, and event venue on the waterfront of Manistee Lake in Manistee, Michigan. She was designated a National Historic Landmark in 1990.
Edna G is a tugboat which worked the Great Lakes and is now preserved as a museum ship. Edna G was built by the Cleveland Shipbuilding Company in 1896 for the Duluth and Iron Range Railroad at a cost $35,397.50. She was named for the daughter of J. L. Greatsinger, president of the railroad.
The Santa Fe Railroad tugboats were used by the Atchison, Topeka and Santa Fe Railway to barge rail cars across the San Francisco Bay for much of the 20th century, as there is no direct rail link to the San Francisco peninsula. In the post World War II period, a fleet of three tugs moved the barges: the Paul P. Hastings, the Edward J. Engel, and the John R. Hayden. After cross-bay float service had ended and the tugs had been sold, the Hastings sank off Point Arena, California in 1992, in water too deep to raise. The Engel sank off Alameda, California in 2007 and was raised and scrapped in the winter of 2013-14. The Hayden remains afloat and in service in Oregon.
Luna is a historic tugboat normally berthed in Boston Harbor, Massachusetts. Luna was designed in 1930 by John G. Alden and built by M.M. Davis and Bethlehem Steel. She is listed on the National Register of Historic Places and is a U.S. National Historic Landmark. In 1985, the Luna was designated as a Boston Landmark by the Boston Landmarks Commission.
A "Scotch" marine boiler is a design of steam boiler best known for its use on ships.
Henry Eckford was a small passenger-cargo steamboat built in New York in 1824. She was the first steam vessel in the world to be installed with a compound engine, almost fifty years before the technology would become widely adopted for marine use.
The first USS Triton was an iron-hulled tug purchased by the U.S. Navy in 1889. After more than 40 years of service as a Navy yard tug, she was sold off in 1930 and began a second career as a commercial tug.
R. J. Hackett was a steamer built in 1869 in Cleveland, Ohio, by Peck & Masters. When the ship was first launched, both its wide cross-section and long midships hold were unconventional. The design's clear advantages in moving cargo through the inland lakes quickly resulted in many imitators.
The Gwendoline Steers was a tugboat owned by the Steers Sand & Gravel Company of New York, NY. It sank in an ice storm in Long Island Sound approaching the mouth of Huntington Bay, New York on December 30, 1962, with the loss of the entire crew of nine.
Humphrys, Tennant and Dykes was a British engineering company based in Deptford, London, England.
MV Miseford is a tugboat built in 1915 by M. Beatty & Sons Ltd. in Welland, Ontario.
SS Robert Wallace was a wooden-hulled American bulk freighter that served on the Great Lakes of North America from her construction in 1882 to her sinking in 1902 on Lake Superior near the town of Palmers, St. Louis County, Minnesota, United States. On November 17, 1902 shortly after leaving Superior, Wisconsin with a cargo of iron ore, Robert Wallace sprang a leak and sank. Her wreck was found in 2006, and on October 14, 2009, the wreck of Robert Wallace was listed in the National Register of Historic Places.
The SS Lakeland was an early steel-hulled Great Lakes freighter that sank on December 3, 1924, into 205 feet (62 m) of water on Lake Michigan near Sturgeon Bay, Door County, Wisconsin, United States, after she sprang a leak. On July 7, 2015, the wreck of the Lakeland was added to the National Register of Historic Places.
SS Selah Chamberlain was a wooden-hulled Great Lakes freighter that sank in Lake Michigan in 1886, 6 miles (10 km) off the coast of Sheboygan, Sheboygan County, Wisconsin, United States after being rammed by the steamer John Pridgeon Jr. with the loss of five lives. On January 7, 2019, the wreck of Selah Chamberlain was listed on the National Register of Historic Places, and was given the reference number 100003288. She was the first shipwreck listed on the National Register of Historic Places in 2019.
Thomas Friant was a wooden-hulled ferry that served on the Great Lakes from her construction in 1884 to her sinking in 1924. In January 1924, while gillnetting out of Two Harbors, Minnesota in Lake Superior, she was holed by ice, and sank with no fatalities. In 2004 her wreck was discovered in over 300 feet (91 m) of water in pristine condition. The wreck of Thomas Friant was listed on the National Register of Historic Places in 2019.
Robert C. Pringle, originally named Chequamegon, was a wooden-hulled American tugboat that sank without loss of life on Lake Michigan, near Sheboygan, Wisconsin, on June 19, 1922, after striking an obstruction.
United States 
