What professionals need to understand
MARPOL Annex VI addresses air pollution from ships and includes requirements that can affect fuel, emissions, equipment, certification and energy-efficiency management.
The strongest approach is to connect the written requirement or procedure to what can actually be observed, demonstrated and recorded. A certificate or completed form is useful evidence, but it does not replace verification of the underlying condition or activity. Scope also matters: vessel type, flag, trade, cargo, equipment and local requirements can change what is applicable.
This guide is designed as a practical learning resource. It deliberately separates general professional practice from official requirements, and it should be used alongside current primary sources and the ship or company’s approved procedures.
Key checks and evidence points
Certificates and required records
Fuel-oil documentation and samples where applicable
Sulphur compliance arrangements
NOx-related documentation where applicable
Ozone-depleting substances records where applicable
Energy-efficiency requirements applicable to the ship
These points are not intended to be a universal statutory checklist. They are prompts for a structured review. Where a requirement is not applicable, record the basis rather than forcing the item into the scope.
A disciplined working method
- Define scope. Confirm the vessel, operation, assignment, applicable procedure and objective before collecting evidence.
- Review documents. Identify the certificates, records, plans, logs or instructions relevant to the scope.
- Verify condition and practice. Compare documents with what is physically present and what personnel can demonstrate.
- Record objective evidence. Note facts, dates, identifiers, measurements or observations clearly enough for another competent reader to follow.
- Manage exceptions. Escalate safety-critical issues and distinguish defects, observations and limitations according to the applicable system.
- Close the loop. Track corrective action, supporting evidence and verification where follow-up is required.
Practical review checklist
- Certificates and required records
- Fuel-oil documentation and samples where applicable
- Sulphur compliance arrangements
- NOx-related documentation where applicable
- Ozone-depleting substances records where applicable
- Energy-efficiency requirements applicable to the ship
Quality-control questions
- Does the record match the actual condition or operation?
- Is the source current and applicable to this vessel and scope?
- Can another competent person reproduce or understand the conclusion?
- Are limitations, exceptions and unresolved items stated clearly?
- Is corrective action supported by objective evidence rather than a completion tick alone?
From guidance to competence
Continue with IMT training
Use the relevant IMT programme to build a structured understanding of the subject and its professional application.
View Relevant Training →Frequently Asked Questions
What is the main purpose of MARPOL Annex VI: Shipboard Compliance?
The practical purpose is to help maritime personnel understand the scope, evidence and controls relevant to MARPOL Annex VI compliance, while applying the vessel’s procedures and current applicable requirements.
Is this an official regulatory checklist?
No. This is an IMT educational framework. Always use the current applicable convention, code, flag-State, port-State, company and contractual requirements.
What should be kept as evidence?
Keep records that demonstrate what was checked, the result, identified limitations, corrective action and any required verification or follow-up.
Related Maritime Insights
Primary and authoritative sources
International Maritime Training (IMT) is an independent training provider. This page is an educational resource and is not issued by, affiliated with or endorsed by the authorities referenced above. Always verify current applicable requirements before operational use.