The project aims to develop a cutting-edge Visual-Inertial Navigation System (VINS) integrated with Radar technology for high-end handheld devices. This system will enhance positioning, navigation, and timing (PNT) capabilities, providing precise and reliable location data even in challenging environments such as indoor use cases. Leveraging Continental Safety Engineering International GmbH's expertise in camera, RADAR, and connectivity development, the project seeks to deliver a robust solution that meets the technical and management requirements outlined by the European Space Agency. The proposed approach includes technology review, use case definition, solution trade-off, design and integration, ensuring comprehensive development and implementation of the advanced navigation system.