Several ironclads and a paddle steamer at the Battle of Fort Hindman
Image of a paddle steamer
A steamship was a type of ocean-going vessel that was powered by steam. A steamship that operated in rivers was known as a paddle steamer or riverboat.
In the mirror universe, a 22nd century Trip Tucker likened his understanding of how to operate the 23rd century Constitution-class USS Defiant with the analogy, "It's like I'm chief engineer on a steamship coming aboard the first interplanetary transport." (ENT: "In a Mirror, Darkly, Part II")
In an alternate 2374, Tom Paris devised an transverse bulkhead system for USS Voyager that was inspired by the system used aboard the "ancient steamship" RMS Titanic. (VOY: "Year of Hell")
A photograph of an ancient paddle steamer was on the wall at Sisko's Creole Kitchen in 2375. (DS9: "Shadows and Symbols")
A holographic version of the A.B. Chambers, a 19th century riverboat, was available on the USS Cerritos. (LD: "Something Borrowed, Something Green")