The Danish Geodata Agency, in collaboration with Aalborg University, is revolutionizing the creation of nautical charts by utilizing big data and cutting-edge technology. Traditional nautical chart creation is resource-intensive and requires precise bathymetric data to ensure safe navigation. The project introduces Crowdsourced Bathymetry (CSB), where ships equipped with echo sounders contribute depth measurements as they sail. The collected data is processed through Gavian TCSB boxes onboard these ships, allowing for real-time comparison with stored nautical charts and instant detection of discrepancies. With the aid of Artificial Intelligence (AI), the system determines whether the collected data is of high priority and should be transmitted immediately via satellite or if it can be deferred to cheaper communication methods. Through repeated data collection, even uncharted waters can be mapped more efficiently, providing updated, accurate charts for safer and faster navigation. This effort is part of the EU MobiSpaces project, which focuses on decentralized mobile data management and enhances marine data processing across Europe.