With reference to entry into enclosed spaces onboard, define “Enclosed space”, give examples, describe atmosphere testing and explain safety precautions?
Short answer
- Definition: space with limited openings, inadequate ventilation, not designed for continuous occupancy
- Examples: cargo spaces, double bottoms, fuel/ballast tanks, pump-rooms, compressor rooms, cofferdams, chain lockers, void spaces, duct keels, inter-barrier spaces, boilers, engine crankcases, scavenge air receivers, sewage tanks
- Atmosphere test: calibrated portable instrument measures O₂, flammable gases/vapours, H₂S, CO at multiple levels before and during entry
- SOLAS XI-1/7: every ship carries such instrument(s); suitable calibration means provided
- SOLAS III/19: enclosed-space entry and rescue drills at least once every two months
- ETO role: verifies electrical isolation, confirms instrument calibration, follows permit-to-work, maintains communication, ensures rescue readiness
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 ETO section of the Marine One forum, open to members enrolled for the ETO exam.