This Hornet Upgrade set (HUG) is meant for former Aussie Legacy Hornets thet were sold to Canada and all incorporate the HUG upgrade set.
The Hornet Upgrade Program (HUG) began in 1999, and had three main phases.[39] In Phase 1, which ran from mid-2000 through 2002, the Hornets' computer systems, navigation system and radio were replaced. The aircraft were also fitted to operate the ASRAAM air-to-air missile; these weapons replaced the AIM-9 Sidewinder.[42] HUG Phase 2 comprised four sub-elements and sought to improve the Hornets' combat performance.[39] During Phase 2.1 the APG-65 radar was replaced with the improved AN/APG-73, and the aircraft were fitted with a secure voice encryption communications system and various updates to their computer systems.[42] In HUG Phase 2.2, the most important element of the program, the Hornets were fitted with a Joint Helmet Mounted Cueing System, equipment needed to share data through the Link 16 network, a new countermeasures dispensing system and several upgrades to their cockpit displays. All of the Hornets were upgraded to this standard between January 2005 and December 2006.[43] In Phase 2.3, an improved Electronic Counter Measures system was fitted to the Hornets; the AN/ALR-2002 was originally selected, but proved unsuccessful. It was replaced by the ALR-67 Radar Warning Receiver in late 2006. As of early 2012, 14 Hornets had been fitted with the system and the remainder were scheduled to receive it by the end of the year.[44][45] During HUG Phase 2.4 the Hornets were modified to be able to use the AN/AAQ-28(v) "LITENING" targeting pod and 37 of these systems were purchased; this phase was completed in 2007.[44] The third stage of the Hornet Upgrade Program sought to rectify airframe damage.[39] HUG Phase 3.1 involved minor structural work to all aircraft as they passed through other phases of the program. The centre fuselages of the ten Hornets assessed as suffering the greatest amount of structural damage were replaced in HUG Phase 3.2. It was originally intended that all the RAAF's Hornets would receive new centre fuselages, but the scope of this phase of the program was reduced after it was found that the number of man-hours needed to upgrade each aircraft was much greater than originally estimated. The ten aircraft were upgraded at an L-3 Communications facility in Canada, and all were returned to service by June 2010.[44] The long-running HUG process complicated the RAAF's management of its fleet of F/A-18s. At any one time, the capabilities of individual aircraft differed considerably depending on their upgrades. Accordingly, the long-standing arrangement where aircraft were almost permanently assigned to each squadron was replaced by a system where they were pooled. Attempts to allocate Hornets with similar levels of modifications from the common pool to each squadron were not successful.[46]