The Gravity Diffusion system, or G-Diffusion, is an experimental power system fuelled by hydrogen that is used in starfighters to reduce gravity forces on the pilot and provides a respectable power source for shields and propulsion, also allowing extended operating ranges. However, due to the temperamental nature of the G-Diffuser, these systems need to be carefully checked and maintained; while easy to fix in flight, they can consume a pilots' full attention, something that kills pilots in a dogfight.