This document describes the work of the project Future Electronic Warfare Duel Simulation during 2007. The project started in 2006 and ends in 2008. The project uses and improves the multispectral framework EWSim (Electronic Warfare Simulation interface model) for distributed electronic warfare simulations. The framework consists of three parts, one for scenario planning and configuration, where models are configured and where some range calculations can be made, one for dynamic duels, and finally one assessment module where the duels can be replayed and logged data analyzed. EWSim has models of platforms, countermeasures, warners, sensors and missiles with target trackers and motion models. In 2007 models of mine-hunting ships using electrooptical sights for measuring distances by laser and laser countermeasures against anti-tank missiles been implemented. In this system, the operator could manually identify and judge the target from a threat point-ofview. This information can be included into the C2-system so that the effect of cooperating units may be studied. The network model has been improved by using a model for CDMA in the communication between nodes. A new algorithm for TDOA-positioning has been implemented. During a simulation, the planning tool EWPlan together with the staff-tool will be helpful to see how the situational awareness based on collected data can be combined with a planning tool for deployment of jamming and signal-intelligence units. To make it easier to distribute the software to less experienced users, a possibility to run a simulation without using HLA has been developed. The code in both EWSim and EWPlan are either developed in house or open source. Therefore there is no license costs for distribution within the Swedish defence.