CMI Practice Test

The Certified Marine Investigator (CMI) exam is for marine investigation professionals who meet the International Association of Marine Investigators’ eligibility requirements. This page brings together free practice sets, worked explanations, and verified information about eligibility, exam format, and scoring. Use the questions to examine your reasoning and identify topics to revisit. These are our practice questions, not real exam questions; this page’s content is written with AI tools.

CMI Exam at a Glance

What changed for CMI in 2026

• Oct 27, 2026: Delivery changed to In person, proctored at Annual Training Seminars or designated locations (previously Proctored, in person at IAMI Annual Training Seminars or other designated locations).^[1]
• Oct 27, 2026: Eligibility changed to Active IAMI member, high school diploma/GED, 3+ years experience, minimum 250 eligibility points (previously Active IAMI member, high school/GED, 3+ years related experience, 250 eligibility points).^[3]
• Oct 27, 2026: Number of questions changed to Up to 150 true/false and multiple-choice questions (closed book) (previously Up to 150 true/false and multiple-choice questions, closed book).^[1]
• Oct 27, 2026: Renewal changed to $95 every 5 years; 100 points including 70 training points (previously $95 every 5 years (+$50 late fee during suspension); 100 points incl. 70 training points).^[2]
• Oct 27, 2026: Score release changed to Graded immediately by software; notified within 14 days (previously Graded immediately by software; applicant notified within about 14 days).^[1]
• Oct 27, 2026: Testing window changed to February 21–24, 2027 (previously At IAMI's 37th Annual Training Seminar, Feb 21–24, 2027 (New Orleans)).^[4]
• Oct 27, 2026: Time limit changed to 3 hours (previously 3 hours maximum).^[1]
• Oct 27, 2026: Validity changed to 5 years, renewable July 31 of certification year (previously 5 years, renewable July 31 of the certification year).^[2]

What the CMI is and how it works

According to International Association of Marine Investigators, “Examination is designed to test the applicant on a multitude of topics through the use of true/false and multiple-choice questions. It shall be a “closed book” examination and consist of no more than one hundred fifty (150) questions.”^[1]

The Certified Marine Investigator examination is part of the International Association of Marine Investigators’ certification process. Candidates must be active IAMI members, hold a high school diploma or GED, have at least 3 years of experience, and meet the minimum of 250 eligibility points. Consult IAMI’s official eligibility material to establish how your experience and qualifications count toward those points.

The exam is delivered in person at Annual Training Seminars or designated locations. It is proctored and closed book, with up to 150 true/false and multiple-choice questions and a time limit of 3 hours. The passing score is 80%, and results are reported as pass/fail. Software grades the exam immediately; IAMI’s notification period is within 14 days of receiving the grading information, so immediate grading does not mean immediate notification.

If you need a retest, the fee is waived for 1 year or until the next Annual Training Seminar, whichever is greater. Refer to IAMI’s official examination, eligibility, and fees/recertification pages for the governing requirements. No official content-area outline has been verified for this page, so the practice-set titles below should not be treated as an official exam blueprint.

Worked examples: how to reason through CMI questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: A crew member's failure to follow a written procedure due to time pressure is best categorized under James Reason's error model as:

1. A violation — a deliberate deviation from a rule or procedure
2. A slip — an unintentional error during an automatic action
3. A lapse — a memory failure during a routine task
4. A mistake — incorrect application of a good rule

Answer: A. A violation — a deliberate deviation from a rule or procedure

Explanation:

A is correct if the crew member knowingly chose to depart from the written procedure. Under Reason’s model, that deliberate departure is a violation, even when time pressure explains the choice. A slip involves an unintended action during execution, rather than a conscious departure. A lapse involves forgetting something, which the scenario does not describe. A mistake concerns faulty judgment or planning rather than knowingly disregarding a procedure. The wording leaves the crew member’s intent implicit: time pressure alone does not establish deliberate conduct. Remember the distinction between intention and outcome: choosing to depart from a rule differs from intending to follow it but acting incorrectly or forgetting a step.

Example 2

Question: What is the final step in forensic evidence analysis?

1. Final report
2. Evidence destruction
3. Data deletion
4. Ignoring findings

Answer: A. Final report

Explanation:

A, final report, is the best answer among the choices. Reporting brings the analysis together so that others can understand what was examined, what was found, and how the findings support the conclusions. Evidence destruction is not an analytical conclusion and would require separate authority and handling decisions. Data deletion removes information rather than explaining findings. Ignoring findings prevents an accurate account of the analysis. Remember that analysis must produce an accountable record. A report should distinguish observations from interpretations and identify limitations. Treat “final step” here as the reporting stage of the question’s simplified workflow; it does not establish that evidence retention or later investigative work has ended.

Example 3

Question: What is the PRIMARY purpose of obtaining CMI certification in Certified Marine Investigator?

1. To satisfy a personal achievement goal
2. To demonstrate verified competency and adherence to professional standards
3. To guarantee employment
4. To bypass educational requirements

Answer: B. To demonstrate verified competency and adherence to professional standards

Explanation:

B is correct: the question identifies demonstrating competency and adherence to professional standards as the purpose of certification. Personal achievement may be a candidate’s motivation, but it does not explain the credential’s professional purpose. Employment is a separate decision; obtaining a credential does not establish that an employer will hire the holder. Bypassing educational requirements is also incorrect because certification candidates must meet the applicable eligibility requirements. Remember to separate purpose from personal benefit. When a question asks why a professional credential exists, look for the answer about demonstrated qualifications and standards, rather than an individual ambition or an employment outcome.

How to use these practice tests

Start with IAMI’s official eligibility and examination material. Confirm how you qualify, then record the closed-book format, time limit, and passing requirement. Use the official material to guide preparation; the practice categories on this page are not a verified exam outline.

Begin with CMI Fundamentals & Core Concepts. Answer without reference material, then review each explanation. For every uncertain answer, write down the distinction you missed and check the underlying concept against relevant official material.

Choose follow-up sets based on those gaps. Use Evidence Collection & Forensic Analysis to examine evidence reasoning and Report Writing & Case Documentation to practise communicating findings. Explain why the alternatives are wrong before moving on.

Return to missed questions after reviewing the topic. Before test day, check IAMI’s official examination information and your designated location details. Practise recalling concepts without notes rather than relying on recognition of familiar answer wording.

Sources & last verified

1. International Association of Marine Investigators — number of questions, time limit, passing score, delivery (official source). “Examination is designed to test the applicant on a multitude of topics through the use of true/false and multiple-choice questions. It shall be a “closed…” Verified Oct 27, 2026.
2. International Association of Marine Investigators — retake policy, validity, renewal (official source). “If a retest is required, the fee shall be waived for a period of one (1) year or to the next Annual Training Seminar, whichever…” Verified Oct 27, 2026.
3. International Association of Marine Investigators — eligibility (official source). “In order to ensure that only qualified members sit for the Examination, an applicant must have a minimum of two hundred and fifty (250) points…” Verified Oct 27, 2026.
4. iamimarine.glueup.com — testing window (official source). “IAMI also offers testing for two certifications: Certified Marine Investigator (CMI) and Certified Marine Fire Investigator (CMFI). To learn more about these programs, please read…” Verified Oct 27, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.