Enclosed space entry

Hazard awareness and preparations for entry

Entering a space can be dangerous because the atmosphere inside may not support life. It’s essential that you stop and think; am I following procedures? Have I taken the necessary precautions? If not, you’ll put people at risk, including yourself!

  • Film: #2509.01
  • Revision: 5.00
  • Published: 3/15/2017 12:00:00 AM


The IMO defines an enclosed space as ‘an area on board which has limited openings for entry and exit, inadequate ventilation, or is not designed for continuous worker occupancy’, but any space can be dangerous, not just those that are defined as ‘enclosed’.

Legislation & references

  • STCW A-VI/1-4 + relevant parts of A-II/5, A-III/5 and A-III/7 + A-II/1, A-II/2, A-II/3, A-III/1, A-III/2, A-III/4 and A-III/6
  • COSWP Ch15
  • ILO Code of Practice on “Accident Prevention on Board Ship at Sea and in Port” ch10.
  • IMO Resolution A.1050(27).
  • ISGOTT CH10 + refs in chs 2, 7 and 14

Learning Objectives

  • Identify the hazards associated with enclosed spaces
  • Describe the testing  equipment used prior to enclosed space entry
  • Identify the preparations to be made, and procedures to be followed, before entry into an enclosed space
  • Describe the additional precautions required when the atmosphere in an enclosed space is known or suspected to be unsafe
  • List  the personal protective equipment required for entry into an enclosed space
  • Identify the entries to be made on an Enclosed Space Entry permit
  • Indicate the importance of comprehensive team briefing before enclosed space entry


English, Chinese, Spanish, French, Korean


20 minutes


  • Exmar Ship Management
  • Maritim Management
  • Arco Limited
  • Nordic Hamburg
  • Maersk Tankers

Related Information

Operation and Safety

- Generic

Target groups

  • Deck - Management
  • Deck - Operational
  • Deck - Support
  • Electric - Operational
  • Electric - Support
  • Engine - Management
  • Engine - Operational
  • Engine - Support
  • Support Galley