This study evaluates the effectiveness of high-fidelity maritime simulators in improving seafarer training, focusing on navigation and emergency response skills. Using Kongsberg Polaris full-mission simulators, 98 participants (students, professionals and instructors) completed structured simulator exercises and were assessed using customised post-exercise questionnaires. Results indicate improved practical skills, with professionals reporting higher confidence and perceived control than students. Emotional engagement was also important: professionals showed more balanced responses, whereas students exhibited higher arousal and more variable perceptions of control. Instructors emphasised real-time feedback and scenario customisation as key to effective training. Limitations included challenges with certain manoeuvres, lack of integrated assessment tools and high simulator costs limiting wider adoption. The study concludes that high-fidelity simulators are valuable in maritime education, although further technological development and adaptation for less experienced trainees are needed.