Most countries have some rivers on which steam ships were used. You need to state a specific country.
First were sailing ships, THEN steam ships.
paris
Some older ships used the power of steam to propel them through the water. A boiler is used to heat water to make steam which is passed to a steam engine which turns the propeller. In ships like the Titanic the boiler was fuelled by coal but later steam ships used gas to heat the water.
Coal
As fuel oil in the boilers of steam-turbine powered ships, perhaps.
SS means Streamship.It is usually understood to mean "Steam Ship" Some ships used TSS for "Turbine Steam Ship"
Viking Ships are no longer used because with the advent of steam power and industrialization the metal ships are much more efficient at doing everything.
Steam ships are largely obsolete in commercial shipping today, having been largely replaced by diesel and gas-powered vessels due to their efficiency and speed. However, some steam-powered ships are still used for tourism, historical reenactments, or educational purposes. Additionally, steam propulsion technology has seen a revival in niche applications, such as small-scale or recreational boating. Overall, while not prevalent, steam ships still have a presence in specific contexts.
They used steam boats.
A steamboat. Although that term is no longer typically used for modern ships. Most large ships still use steam for propulsion, usually a boiler feeds steam to a turbine (radial steam engine) which in turn spins the propellers.
Before electricity, Coal was used for heat. Coal heat was used to create steam for steam engines on railroads and ships in transportation.
The type of riverboat that is used for Mississippi River cruises are Luxury Cruise Ships. Cruise ships are used for long sales to ensure comfort and entertainment for the passengers.