Floating cities, conceived as a remedy for overcrowding and the challenges posed by rising sea levels, present distinct hurdles, particularly in waste management. The case study of a Waste Collection Vessel (WCV) seeks to examine these associated challenges. It delves into the assumptions, limitations, and risks involved in addressing garbage management in large floating habitats. The analysis encompasses both formal situations and technical solutions. The culmination of this study is the proposal for a “floating garbage truck”—a zero-emission autonomous catamaran designed to be an intelligent vessel equipped with advanced technologies. It will be highly flexible and ideally suited for applications in floating cities, capable of tasks such as removing surface garbage, collecting garbage containers from habitats, addressing oil spills, and cutting weeds. The design of WCV ship was developed because of the ZeroWastePorts project.