Nautical Term: IFO

Definition of IFO

Intermediate Fuel Oil, commonly referred to as IFO, is a heavy fuel oil used for marine propulsion. This oil falls between the lighter Bunker C Fuel Oil and the heavier Heavy Fuel Oil (HFO) with a viscosity greater than 180 centistokes.

For instance, during a lengthy voyage, a ship might consume Intermediate Fuel Oil to propel itself forward. At the same time, they may opt to carry lighter Bunker C Fuel Oil for use in the ship’s auxiliary engines or generators.

Explore other nautical terms:

Head back to the Nautical Dictionary

Take a Tour With Us!

Recommended Reading