 When the Australian Orion upgrade project was being developed in 1996 there was not an 'off the shelf' package of upgrades that met the requirements specified by the RAAF.As a result, it was decided to tailor the upgrade to Australian specifications, which included integrating different systems.The systems integration task proved to be much more difficult than was expected, and L3 Communications and its suppliers were required to write over two million lines of software code.