Dehydration of liquid fuel

A method for dehydrating liquid fuel stored in a container, the method comprising injecting a supply of dry gas into a liquid fuel via an outlet disposed near the bottom of the container and submerged in the liquid fuel, the dry gas having a water vapour content lower than a water content of the liquid fuel, the dry gas exiting the outlet forming bubbles which rise through the fuel and diffusion of water from the fuel into the gas occurs until equilibrium is reached, and the container having a vent to ambient atmosphere external to the container through which fuel tank ullage displaced by introduction of the dry gas passes.