Cabins. The Air Defence and Air Traffic Systems Delivery Team (ADATS DT) has a requirement for the In Service Support (ISS) and Post Design Services for Quantity 3 Transportable Airfield Radar Display Mk3 (TARDIS) variant cabins. The Contractor will be required to act as the Design Authority (DA) for the mechanical infrastructure, electrical installation and container integrity of the TARDIS cabins together with providing DA support services as required by the Authority, ensure the cabins continue to meet electrical and mechanical safety regulations and container safety conventions, operate a quality management system to the satisfaction of the Authority, provide input to the safety case assessor for documentation and to Airfield Publications pertaining to the equipment, manage, monitor and report obsolescence issues to the Authority and provide electrical and mechanical services and spares as required. Activities include but are not limited to holding mastercopies of documentation pertinent to the design and specification, including amendments, providing Customer Support Management, technical and administrative advice and assistance, System Design Authority services, conducting repairs or upgrade services AD Hoc tasking, advising the A uthority of modifications to similar equipment that could be beneficial to MOD.