What is a steam boiler's main purpose on a vessel?

The main purpose of a steam boiler on a vessel is to generate steam that is used for propulsion and/or machinery operation. In many marine applications, especially on steam-powered vessels, the steam generated in the boiler is essential for driving the ship's main propulsion system as well as providing power to auxiliary machinery. This steam is produced by heating water through the combustion of fuel, and it is then channeled to turbines or other machinery where it can do work.

Generating steam for propulsion is critical in vessels that rely on this form of power, and it also supports fluid systems, heating, and various mechanical operations onboard. This central role in propulsion and operation highlights the steam boiler's importance in the overall functioning of the vessel.