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Enclosed Space Entry
Gas testing sequence, permit requirements, and the single most important rule if someone is found incapacitated inside.
⚠ Enclosed space entry remains one of the leading causes of multiple-fatality incidents at sea — often because a would-be rescuer enters without protection to help a colleague who has collapsed. Follow this procedure every time, without exception.
What Counts as an Enclosed Space
An enclosed space has limited openings for entry and exit, unfavourable natural ventilation, and is not designed for continuous worker occupancy.
Common examples on board include: cargo holds, ballast tanks, fuel tanks, cofferdams, duct keels, pump rooms, chain lockers, void spaces, and inerted spaces on tankers.
Some spaces are less obviously "enclosed" but still qualify — always check your vessel's specific list rather than assuming based on appearance alone.
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