Define enclosed space, give examples, describe the enclosed space entry procedure, and state the permit required with its issuance and validity?
Short answer
- Definition: Space with limited openings, inadequate ventilation, not designed for continuous worker occupancy
- Examples: Cargo spaces, double bottoms, fuel tanks, ballast tanks, pump-rooms, compressor rooms, cofferdams, chain lockers, void spaces, duct keels, inter-barrier spaces, boilers, engine crankcases, engine scavenge air receivers, sewage tanks
- Procedure: Identify and register, risk assessment, isolate, ventilate, test atmosphere (O₂ 20.9%, flammable <1% LFL, toxic <50% OEL), entry arrangements (attendant, communication, lighting, harness, rescue equipment), continuous monitoring, no naked lights
- Permit: Enclosed Space Entry Permit issued by master or responsible officer, valid for single time-limited entry period
- Governing instruments: IMO Resolution A.1050(27), SOLAS XI-1/7, SOLAS III/19
- India (flag): Merchant Shipping Act 2025 section 147, DGMA verification
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.