Bunker fuel is a type of fuel used primarily in ships and large vessels. It is a thick, heavy oil that is derived from crude oil and is specifically designed for marine engines. Bunker fuel is essential for powering cargo ships, tankers, and other large maritime vessels, making it a crucial component of global trade. There are different grades of bunker fuel, with IFO 380 and MGO being the most common. The choice of fuel depends on the ship's engine type and operational requirements. Due to its high sulfur content, the use of bunker fuel has raised environmental concerns, leading to regulations aimed at reducing emissions from ships.