steam boats and steam trains use coal power
It was used to fuel their steam engines, which was their method of locomotion back then.
Steam coal.
its more efficient and diesel trains consume more natural resources like oil which is also used for planes, cars and boats. only steam trains use coal.
The steam engine helped power machines which was able to help process more coal and iron. It also powered trains and boats which could transport more coal and iron, making productivity much faster.
Stokers or boiler tenders, they tend the boilers, not the engines which run on steam.
steam to turn the turbine
COAL
The most useful energy that coal provides is as a fuel for combustion; we have to burn it. Burning coal creats heat we can use to boil water, turning it to steam, and then we use the steam to drive turbines to make electricity.
The steam engine helped power machines which was able to help process more coal and iron. It also powered trains and boats which could transport more coal and iron, making productivity much faster.
Water is cheap and you burn any thing in the furnace on the old steam boats!!
Generally speaking either a petrol/gasoline, some use a mixture of p/g and oil, then there is diesel fuel. Some military vessels use nuclear power and there are vessels out there that use steam power provided by coal or wood.