Battle simulators. Military electronic systems. Training and simulation in military electronic systems. Interim IDFS will bring a capability into service from 2022 to support 105mm Light Gun and 81mm Mortar training. The system shall produce a realistic simulated firing solution, fall of shot and effect within a simulated environment and be able to integrate with in-service simulation systems and based on open architecture and DmaSC compliance, ensure integration with potential future systems. An outline of the proposed requirement will be to demonstrate, implement and manage, over an initial period of 3 years followed by 7 x 1-year options (subject to change) a managed service capable of delivering more effective and better assured Individual, Trade and Collective Training. A change in the quantity of 81mm mortar and/or 105mm artillery equipments may or may not occur throughout the duration of the Contract. In issuing this Contract Notice and engaging with the Market, the Authority is not committing to carrying out any procurement in relation to the requirements stated in this notice. If third parties are interested in engaging with the Authority in relation to the requirements stated here, they must do so without sharing information that is protected by copyright or patents.