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ISM Code maritime compliance is one of the most fundamental requirements in professional ship operations. The International Safety Management Code — adopted by the IMO under SOLAS Chapter IX — requires every shipping company and vessel to operate within a documented Safety Management System (SMS). For deck and engineering officers, understanding the ISM Code is not optional: it defines how you manage emergencies, document incidents, and uphold the safety culture onboard.

This guide explains what the ISM Code requires, how the SMS works in practice, the role of the Designated Person Ashore (DPA), and what officers need to know about ISM audits and certification.

What Is the ISM Code?

The International Safety Management Code is an IMO standard for the safe management and operation of ships and for pollution prevention. It became mandatory under SOLAS Chapter IX in 1998 for passenger ships, tankers, bulk carriers, and high-speed craft — and extended to all other SOLAS vessels by 2002. The ISM Code requires shipping companies to develop, implement, and maintain a Safety Management System covering all aspects of vessel operation.

The core objective of the ISM Code is to provide an international standard for the safe management of ships. It creates a documented, auditable framework that holds both the company and the ship accountable for safety outcomes.

The Safety Management System (SMS)

The SMS is the company’s documented system for implementing ISM Code requirements. Every vessel operating under ISM must have an SMS on board that includes:

• A safety and environmental protection policy
• Instructions and procedures for safe ship operation and environmental protection
• Defined levels of authority and communication between shore and shipboard personnel
• Emergency preparedness and response procedures
• Procedures for reporting non-conformities, accidents, and hazardous occurrences
• Procedures for maintenance of the ship and equipment
• Document control procedures
• Internal audit procedures

Officers are expected to be familiar with the relevant sections of the SMS for their role. During ISM audits and PSC inspections, examiners will ask officers to demonstrate knowledge of SMS procedures — particularly emergency procedures and non-conformity reporting.

The Role of the Designated Person Ashore (DPA)

A core ISM Code requirement is the appointment of a Designated Person Ashore (DPA). The DPA is the link between the company’s shore management and the vessel — responsible for monitoring safety aspects of vessel operation and ensuring adequate resources and shore-based support are available. Seafarers have the right — and the obligation — to report safety concerns and non-conformities directly to the DPA, bypassing normal command structure if necessary.

“The ISM Code only works if people actually use it,” explains a veteran Master with over 25 years of command experience. “Non-conformity reporting is not about blame — it is about identifying system failures before they become accidents. Officers who understand this contribute enormously to safety culture.”

ISM Certification: DOC and SMC

ISM compliance is evidenced by two certificates:

• Document of Compliance (DOC) — issued to the shipping company, certifying that its SMS meets ISM requirements. Issued by the flag state or a Recognised Organisation (RO) on its behalf.
• Safety Management Certificate (SMC) — issued to the individual vessel, certifying that the ship’s SMS operates in accordance with an approved DOC. The SMC is valid for five years with intermediate verification.

Both the DOC and SMC are subject to regular audits — initially to issue them, and then at annual, intermediate, and renewal intervals. PSC inspectors check that these certificates are valid and that the vessel is actually operating in accordance with its SMS. Discrepancies between documented procedures and actual practice are common ISM deficiencies. For PSC inspection preparation, see our Port State Control guide.

Officer Responsibilities Under the ISM Code

As a shipboard officer, your ISM responsibilities include:

• Knowing and following the SMS procedures relevant to your role
• Reporting non-conformities (deviations from SMS procedures) through the ship’s reporting system
• Reporting near misses, hazardous occurrences, and accidents promptly and accurately
• Participating in internal audits and drills as required by the SMS
• Ensuring that new crew members are familiarised with the SMS on joining
• Contributing to continuous improvement of the SMS through feedback and reporting

Officers who understand the ISM Code as a safety improvement tool — not just a compliance obligation — are significantly more effective in managing the complex risks of ship operations. See also our STCW Certification guide for the broader qualification framework.

Frequently Asked Questions

Does the ISM Code apply to all ships?
The ISM Code applies to all SOLAS vessels, which includes most commercial ships of 500 GT or more in international service, passenger ships on domestic routes, and mobile offshore drilling units. Some smaller vessels and fishing vessels may be exempt depending on flag state regulations.

What is a non-conformity under the ISM Code?
A non-conformity is any observed situation where objective evidence shows that a requirement of the SMS is not fulfilled. Major non-conformities are those that pose a serious threat to safety or the environment, or that represent a complete failure of the SMS in a particular area. Both must be reported and corrected.

How often are ISM audits conducted?
The DOC is audited annually (within three months of anniversary date). The SMC undergoes an intermediate audit between the second and third anniversary of issue, and renewal audits every five years. Flag states or Recognised Organisations (classification societies) conduct these audits.

What happens if a vessel fails an ISM audit?
Major non-conformities found during an ISM audit can result in withdrawal of the SMC, which effectively prevents the vessel from operating in international trade. Minor non-conformities must be corrected within a specified timeframe. Companies take ISM audit outcomes very seriously as they affect both insurance and commercial trading.

Is ISM training required for seafarers?
While the ISM Code itself does not prescribe a specific training certificate, most shipping companies include ISM familiarisation in their onboarding process. Officers should understand the company’s SMS, the role of the DPA, and how to use the non-conformity and near-miss reporting systems.

Conclusion

The ISM Code is the backbone of modern shipboard safety management. Officers who engage with it seriously — using the SMS as a practical tool, reporting non-conformities honestly, and contributing to safety culture — make a measurable difference to vessel performance and crew welfare. It is not paperwork for its own sake: it is the documented infrastructure that keeps ships and seafarers safe.

Looking for roles with operators who take safety culture seriously? Browse current maritime vacancies at Seaplify.