Assessing a ship’s structural integrity following damage is a critical element of maritime safety, particularly when rapid decisions are required after an accident or during service. This research introduces a risk-based framework that links damage severity to residual structural strength through the development of Residual Strength-Damage (R-D) diagrams. By combining probabilistic damage modelling with structural performance assessment, the method provides a practical tool for evaluating post-damage safety, supporting emergency decision-making, design verification, and the establishment of rational acceptance criteria for damaged ships.

Modern naval operations are increasingly shaped by evolving threats, creating a need for more sophisticated approaches to safety and risk assessment. This study combines probabilistic risk analysis with operational modelling to develop mission-specific safety scenarios, supporting risk-informed decision-making in the design and operation of naval vessels.

Improving fuel efficiency is becoming an increasingly important objective for harbour tug operators seeking to reduce operating costs and environmental impacts. Through a combination of sea trials and analytical modelling, this research identifies optimal engine and propulsor operating conditions, providing practical guidance for enhancing fuel economy and supporting more efficient tug design and operation.

Understanding how ships respond to waves remains fundamental to safe and efficient vessel operation, particularly for Ro-Ro ships that can be sensitive to large motions. Experimental investigation of six-degree-of-freedom responses in irregular seas identified critical relationships between wave frequencies and vessel motions, providing insights that can help operators minimise excessive roll and improve seakeeping performance.