TRUSTEE project aims at supporting the European roadmap to deploy the ZEWT providing the decision makers and the wide stakeholders community with a comprehensive and science-based set of knowledge and recommendations built on an evidence based approach, founded on: - clarity and comprehensiveness of foresight scenarios in 2030 and 2050 where ZEWT will be deployed - a comparative multidimensional assessment framework incorporating environmental, social, technological, financial and operational aspects, including safety and security aspects for workforce and citizens - a robust validation roadmap with an equitable representation of direct and indirect stakeholders. TRUSTEE is built on the following objectives: - Define and validate future European ZEWT wide ecosystem at 2030 and 2050 time horizons through foresight scenarios - Detail and validate the most promising ZEWT Use Cases for the 2030 and 2050 target horizons - Build and validate a multi-stakeholders and cross-sectorial assessment framework for system components and overall ecosystems underpinning the Zero Emissions target in the European water transport sector - Identify systemic and sectorial barriers challenging the ZWET targets and defining recommendations for its timely deployment - Create a common knowledge background among all direct and indirect stakeholders for ZEWT targets timely achievement. Thanks to a consortium with relevant expertise and strong institutional liaison with all the ZEWT stakeholders, TRUSTEE will achieve the desired impact delivering actionable Open Access Results: - ZEWT 2030 and 2050 foresight scenarios - ZEWT technology readiness review - Comparative analysis framework for ZEWT use cases assessment, combining environmental, technical integration, operational, societal and financial indicators - ZEWT barrier analysis - Most promising ZEWT Use Cases - Recommendations for ZEWT standards, regulations and policy development - ZEWT open access learning pack.