Aviation ground support and test software package. An interim contract to support the Chinook Ground Mission Support System (GMSS) which will continue the current GMSS support arrangement to avoid a critical capability gap arising. It will aim to satisfy regulatory requirements and limit contractor rates and profits, refresh Contract Terms and Conditions (T&Cs) to align with current departmental policy, Upgrade GMSS as required by the Authority, Manage obsolescence issues that are likely to impact GMSS products within the future support period and will provide a period prior to a longer term future support QDC contract which will fulfil User needs for a complete software rewrite.