CMI Study Guide 2026
Everything you need to pass the CMI exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CMI Exam Format at a Glance
📚 CMI Topics to Study (37)
✍️ Sample CMI Questions & Answers
1. The 'SHELL model' in human factors analysis is used to examine interactions between which components?
The SHELL model evaluates the interfaces between the central human (Liveware) and Software, Hardware, Environment, and other humans to identify failure points.
2. Under the USCG marine investigation process, a 'formal investigation' (Marine Board of Investigation) is convened when:
A Marine Board of Investigation is convened for the most serious casualties — those involving loss of life, severe injuries, substantial pollution, or significant public interest — where a formal adversarial proceeding is warranted.
3. What is the MOST effective way for new CMI professionals to build competency?
Building competency requires formal education, mentored practice, and ongoing development.
4. What is the purpose of flag state jurisdiction?
Flag state jurisdiction refers to the authority a country has over vessels registered under its flag, regardless of where they are operating. This jurisdiction means the flag state is responsible for ensuring its ships comply with international maritime conventions and national laws concerning safety, environmental protection, and crew welfare. It is a fundamental principle of international maritime law that assigns accountability for vessel operations.
5. Which document would a CMI most likely use to establish a vessel's navigational track during an incident investigation?
AIS data provides a timestamped navigational track of a vessel's position, speed, and course, making it critical evidence in casualty investigations.
6. When a CMI cites 'human factors' as a contributing cause in a report, which model is most commonly referenced to explain how errors occur in complex systems?
James Reason's Swiss cheese model illustrates how multiple layers of defense with individual weaknesses can align to allow errors to propagate through a system and cause accidents.