Measures to Address the Revised Recommendations for Entering Enclosed Spaces Aboard Ships (MSC.581(110)) Full-text PDF:TEC- 1372 (537kb) Contact:Ship Management Systems Department Issued:6 Feb 2026 At the 110th session of the Maritime Safety Committee (MSC 110) held in June 2025, the Revised Recommendations for Entering Enclosed Spaces Aboard Ships were adopted as IMO Resolution MSC.581(110). This resolution invited the Assembly to revoke resolution A.1050(27) and aims to prevent fatalities and serious accidents related to enclosed space entry by clarifying requirements for definitions, risk assessment, atmosphere testing, carbon dioxide (CO2) management, and emergency preparedness. This Technical Information provides an overview of the main amendments and highlights important points to be considered. 1. Outline Resolution MSC.581(110) is a recommendatory instrument applicable to all ship types. The resolution recommends that enclosed space en