For non-LNG trades, changes in fuel and cargo quantities on board are typically independent of one another. For LNG voyages, however, one of the fuels on board is also the cargo. Fuel transactions affect cargo quantities and vice versa.

The LNG module supports LNG shipping and trading workflows by linking LNG fuel and cargo tracking in IMOS to help users calculate boil-off. LNG is entered into IMOS as both a cargo and a fuel, and any changes to LNG (fuel) or LNG (cargo) quantities are updated in both.