MEO Class IV · Written

Explain the purpose of a Hot Work permit, state the different types of work permit used on ships and their utility, and prepare a checklist for issuance of a Hot Work permit?

Short answer

Permit Type Utility
Hot Work Welding, burning, grinding outside workshop
Dangerous Space Work Entry into enclosed spaces after testing and ventilation
Work at Height Work above deck level requiring fall protection
Overside Work Work over the ship’s side with safety measures
Gas Testing Atmosphere testing to confirm safe conditions
Electrical Isolation Isolate electrical equipment before maintenance
  • Purpose: Formal control of welding/burning/grinding outside workshops to prevent fires and explosions
  • Key check: Work area and far side of bulkheads/decks free from flammable solids, liquids, gases or residues
  • Fire safety: Fire sentry posted, portable extinguishers at site, shielding to prevent spread of sparks
  • Atmosphere: Safe to breathe and remains so throughout the work
  • Validity: Maximum 24 hours
  • Responsibility: Authorised officer issues and retains responsibility; competent person countersigns; EOOW monitors compliance
  • Governing instruments: ISM Code, ILO Safety and Health in Ports §248, MSC.1/Circ.1216 Annex 5 §1, UK Code of Safe Working Practices 14-02, Merchant Shipping Act 2025
  • Trap: Permit does not make the job safe; it ensures identified precautions are in place and maintained

Full answer

The full answer explains each point step by step, with the regulations and figures behind it and the discussion from other candidates. It is in the MEO Class IV section of the Marine One forum, open to members enrolled for the MEO Class IV exam.