Briefly Description 4 application and 4 Mechanism that is used on a steamboat? And how do these applications and Mechanism is applied on a steamboat? Solution Mechanism: Marine steam engine A marine steam engine is a steam engine that is used to power a ship or boat. Propeller A propeller is a type of fan that transmits power by converting rotational motion into thrust. Paddle steamer A paddle steamer is a steamship or riverboat powered by a steam engine that drives paddle wheels to propel the craft through the water. boiler The boiler holds a quantity of water in such a way that most of the heat from the fire can be transferred to the water. The water boils and gives off steam under pressure, so the boiler has the double purpose of transferring heat and containing pressure. The greater the surface area exposed to the fire, the more heat can be transferred to the water ( and the less wasted up the stack ), and the more steam produced. The best way to create this large surface area in a small space is to fill the space with pipes, or tubes. Therefore the heating surface of all steamboat boilers is made up primarily of tubes..