The Hornet Upgrade program (HUG) commenced in 1999. The project sought and continues to seek to modernise the ability of the current ACG fleet of F/A-18A and F/A-18B aircraft and associated support systems. The upgrade project has been set up to elongate the time the Hornet's can run until 2018. The project is being conducted in three phases. This project was established to upgrade the F/A-18 fleet to combine enrichments that will allow the aircraft to more effectively perform its air defence tasks. The project is being conducted in three main phases, phase one has already concluded and phases two and three are currently in production.