This thesis explores the conceptual design of a zero-emission, modular, and standardized Incident Response Vessel (IRV) for the Port of Rotterdam. The goal is to support the port's ambitious sustainability targets, which include reducing CO₂ emissions by 90% by 2030 and achieving a fully emission-free fleet by 2035. In response to the challenge of decarbonizing maritime operations, this research examines how alternative fuels, energy modules, and modular design principles can create a fleet that is resilient and adaptable to future energy technologies.

The study evaluates various ship design methods, focusing on modular design principles to assess how standardization and modularization can best apply to the new vessel design. Among several design approaches, Modular Function Deployment (MFD) was identified as the most suitable. A comprehensive analysis was conducted on all necessary inputs, tasks, functions, and requirements for an IRV, acknowledging that this vessel serves a specialized niche and cannot be treated as a standard vessel type. Due to this unique role, a detailed mapping of current systems onboard was necessary to identify which systems are no longer needed and which new systems are required. This structured analysis forms a foundation for the MFD model presented in the thesis.

Estimates for different alternative energy carriers were created based on scientific research and other data sources, identifying potential matches for the Port of Rotterdam. These estimates serve as a reference for assessing energy needs in the early design phases. By linking energy demands with specific energy carriers, the study enables the design of conceptual models. In addition to the developed model, visual sketches of systems and vessels provide concept designs that serve as visual aids for future decision-making, supporting the port's strategic planning.

This study employs MFD along with other ship design methods to identify strategies for flexible energy system integration, spatial layout efficiency, and operational effectiveness. MFD is applied to IRVs for the first time here, aiming to achieve a robust design that accommodates emission-free technologies such as electric propulsion and alternative fuels like methanol and hydrogen, while meeting functional and operational requirements.

The findings indicate that MFD provides a scalable and structured framework, enabling the Port of Rotterdam to maintain operational flexibility and comply with current and upcoming regulations. The research highlights that a swappable battery system is the most practical solution for immediate implementation, supporting both current tasks and future scalability. Additionally, modularity facilitates easier adaptation to technological advances, paving the way for long-term fleet evolution.

In conclusion, this thesis presents a viable strategy for the Port of Rotterdam to transition to a modular, emission-free IRV fleet that meets operational demands and adapts to emerging energy solutions, positioning the port as a leader in sustainable maritime innovation.