MSC.581(110) Revised Recommendations for Entering Enclosed Spaces Aboard Ships

The IMO has introduced MSC 581 (110) to significantly improve safety during entry into enclosed spaces on ships. These updated recommendations address the ongoing risks of oxygen‑deficient, toxic, and flammable atmospheres that continue to cause serious accidents at sea.

With MSC 581 (110), atmospheric testing becomes more rigorous and more precise than ever before. Oxygen levels must be at least 20.9%, and carbon dioxide must remain below 0.5% (5,000 ppm) before entry.

Crews must also verify that toxic and flammable gases are within strictly defined safe limits to ensure a hazard‑free environment.

The regulation requires every person entering an enclosed space to carry a calibrated personal gas detector, ensuring continuous monitoring throughout the entire operation.
These measures are designed to reduce fatalities, improve risk awareness, and support safer decision‑making across all vessel types.

Dräger Gas Detection: Built for MSC.581(110) Compliance
Dräger’s portable gas detectors—such as the Dräger X‑am series—are engineered to meet the full scope of the new MSC 581 (110) requirements.
Our technology continuously measures O₂, CO₂, flammable gases, and toxic gases, ensuring crews always have the reliable data the regulation demands.

Accurate multi‑gas detection that aligns with all mandated atmospheric parameters.
High‑performance sensors designed for demanding marine environments.
Reliable, easy‑to‑calibrate detectors that support compliance and operational readiness.
Continuous personal monitoring, exactly as required under MSC 581 (110).