This document provides a set of design and installation recommendations for the arrangement and installation of propulsion systems, using hydrogen as fuel, on passenger ships. No new safety requirements are defined in the CWA, but these recommendations can be used for a risk assessment, leveraging on existing standards (e.g. HAZOP, HAZID, FMECA), to be applicable already from the early design phases and discriminating based on the presence of passengers on board. These recommendations can be useful for a risk assessment (to be carried out in a second stage), but the risk assessment is not the focus of this CWA. The document leverages on the results of the experiments carried out within the EU e-SHyIPS project. Ultimately the document is expected to benefit the industry also in terms of knowledge sharing and policy makers for the update of relevant documents.