A Hazard That Does Not Stay in the Hold
Organic bulk cargoes keep working after the hatch cover is closed. Wood pellets, wood chips and similar biomass oxidise in a sealed hold, consuming oxygen while generating carbon monoxide and carbon dioxide. A flag-state investigation published in August 2026 into a 2025 casualty at a Korean discharge berth recorded oxygen at 16.7 per cent and carbon monoxide at 40 ppm in an aft access hatch space connected to a hold that was still fully loaded. The space held no cargo of its own, yet the atmosphere reached it, and the crew member who entered without a permit did not survive.
The investigation pointed at worn warning signage, no physical barriers on access covers, and the absence of any requirement to report entry into spaces informally classed as low risk. Closing those gaps takes staging kit where entry actually happens, not another gas meter.
The pattern is not confined to holds. A safety flash circulated in October 2026 reported hydrogen sulphide picked up by portable detectors in open deck air during transit, traced to bilge vents fed by drilling mud, with no injuries.
What the Rules Now Say
The IMO's revised recommendations for entering enclosed spaces aboard ships, adopted as Resolution MSC.581(110), replaced the long-standing earlier guidance and have been carried into flag and class circulars through 2026. They introduce connected spaces, adjacent spaces and trapped hazardous atmospheres as formal concepts, require a ship-specific enclosed space register and emergency response plan, and set a permit-to-work regime with a default eight-hour validity. Single-person entry is not permitted.
Testing criteria now name carbon dioxide at below 0.5 per cent, or 5,000 ppm, alongside oxygen at 20.9 per cent and toxic gases including carbon monoxide. Ships must carry sufficient portable detectors, and monitors for entering personnel must cover all four gas families. Watchkeepers are directed to raise the alarm rather than attempt a rescue, and entry and rescue drills stay on a two-month cycle under SOLAS.
Why Gloves and Boots Sit Inside the Fix
Specification work follows two very different roles. An entry team member needs gloves and boots that resist what the space actually contains: acidic leachate and condensate from wood cargo, bilge water carrying dissolved hydrogen sulphide, oily residues, and fine cargo dust that works into seams. A rescue team member needs the same chemical resistance with enough dexterity to tie a line around a casualty, work harness buckles and climb a narrow access ladder on breathing apparatus. Here, dexterity is a safety property, not a comfort feature.
Footwear meets wet steel ladder rungs, sloping tank tops and condensate. Slip resistance on wet steel and resistance to organic acids are too often quoted from a datasheet rather than verified.
What to Put in the Enquiry
- Substance-specific permeation and degradation data for organic acids, hydrogen-sulphide-bearing water and hydrocarbons, instead of a generic chemical-resistant claim.
- Cuff and elbow length that stays in place when an arm reaches through a hatch opening.
- Low-temperature flexibility and wet-steel slip performance, with the test method named.
- Batch dates, shelf life and storage guidance, since elastomers age in hot deck lockers.
- Sizing spread matched to the crew list, and replacement cycles aligned with the bimonthly drill calendar so grab bags stay stocked.
Buyers who build the register first will find the glove and boot brief writes itself: one column for substances, one for the duty, and a marked store at the hatch.