Emergency Escape from Machinery Spaces (Category A): Ensuring Compliance and Avoiding PSC Detention

Ensuring compliance with emergency escape regulations from machinery spaces is critical for shipowners, managers, and technical operators. Recent Port State Control (PSC) inspections have led to vessel detentions due to non-compliant emergency escape trunk arrangements, even when approved by flag states or Recognized Organizations. This article explores the regulatory background, industry challenges, and best practices to mitigate risks and ensure compliance.

Regulatory Background

Under SOLAS Regulations II-2/13.4.1.1.1 and 13.4.2.1.1, all machinery spaces categorized as Category A must have two means of escape. If two steel ladders are used to comply with this requirement, at least one must be enclosed and extend from the lowest deck level to a safe exit outside the space.

The IMO Unified Interpretation (UI) MSC.1/Circ.1511/Rev.1, initially approved in 2015, clarifies that machinery spaces may include working platforms, passageways, or intermediate decks at multiple levels. The lower part of the space is defined as the lowest deck level, platform, or passageway within the space.

Furthermore, this regulation mandates that inclined ladders or stairways in machinery spaces forming part of an escape route (but not within a protected enclosure) must not exceed a 60° inclination and should have a minimum width of 600 mm.

Additionally, IACS UI SC 277, applicable to ships contracted for construction on or after 1 February 2016, aligns with SOLAS regulations to ensure standardization across classification societies.

Industry Practice and Challenges

Many vessels are designed with emergency escape trunks that do not extend to the lowest deck level of the engine room. Instead, a combination of inclined ladders and intermediate platforms is used to facilitate escape. The rationale behind this arrangement includes:

• Structural constraints due to hull shape and equipment installations.
• Obstruction by essential machinery that prevents a direct vertical escape route.
• Space limitations that make full extension of the escape trunk impractical.

Despite these practical considerations, PSC authorities have deemed certain configurations non-compliant, leading to vessel detentions.

PSC Scrutiny and Compliance Risks

PSC authorities are particularly focused on ships contracted for construction or with keels laid after 1 February 2016. Inspections have highlighted cases where:

• The escape trunk does not extend to the lowest deck level, raising concerns about accessibility in emergencies.
• Crew evacuation drills are required to demonstrate the feasibility of escape routes.
• Evacuation time is assessed, particularly for the rescue of injured crew members.

If the emergency escape arrangement lacks formal flag state acceptance, vessels risk detention during PSC inspections.

Flag State Requirements and Technical Justifications

Shipowners and operators should proactively engage with their flag administration to secure acceptance of existing emergency escape arrangements. This involves submitting a technical justification addressing:

• Why the escape trunk cannot extend to the lowest deck level.
• Structural and operational limitations.
• Alternative measures ensuring safe evacuation.

A formally approved justification should be kept onboard for presentation during PSC inspections.

IMO Discussions and Future Considerations

The issue was recently discussed at the 11th session of the IMO Sub-Committee on Ship Design and Construction (SDC 11) in January 2025. The committee debated further clarifications on the interpretation of “lower part of the space” concerning escape routes. However, no definitive consensus was reached, and the matter has been referred to the Sub-Committee on Implementation of IMO Instruments (III 11) for further review in July 2025.

Recommendations for Shipowners and Operators

To mitigate the risk of detention and ensure compliance, the following actions are strongly recommended:

1. Develop a Technical Justification
   • Prepare a detailed justification explaining why the escape trunk does not extend to the lowest deck level.
   • Submit it to the flag administration for review and approval.
   • Keep an approved copy onboard for PSC inspections.
2. Update the Safety Management System (SMS)
   • Ensure the SMS includes detailed rescue procedures for evacuating injured personnel from the engine room.
   • Document the procedures for demonstrating compliance during PSC inspections.
3. Conduct Regular Evacuation Drills
   • Familiarize the crew with onboard escape arrangements.
   • Perform drills simulating an injured person evacuation using the existing escape trunk.
   • Maintain records of drills as required by the company’s SMS.

Conclusion

With increasing PSC scrutiny, shipowners and operators must take proactive steps to ensure their emergency escape arrangements comply with SOLAS requirements. By securing flag state acceptance, updating SMS procedures, and conducting regular crew drills, vessels can reduce the risk of detention and improve overall safety readiness.

For further guidance on compliance and regulatory updates, consult IACS UI SC 277, MSC.1/Circ.1511/Rev.1, and SOLAS Reg. II-2/13.4.1 & 13.4.2.

Need expert advice on regulatory compliance? Contact us today for professional marine consultancy services!