Question 1

What is the purpose of practising enclosed space rescue drills using a mannequin or simulated casualty, rather than only discussing the procedure?

Accepted Answer

It tests whether the actual equipment, team, and timeline genuinely work under realistic physical conditions — a paper procedure can look fine on the page but fail in practice due to equipment fit, crew unfamiliarity, or physical access problems A drill reveals real problems — BA sets that do not fit, a stretcher that will not pass through a particular hatch, a rescue team unfamiliar with the recovery equipment, or a casualty weight the lifting arrangement cannot handle. SOLAS III/19 requires drills specifically because procedure-on-paper and procedure-in-practice are not the same thing.

Question 2

Under MSC.581(110), what is the maximum acceptable CO2 reading (by volume) before an enclosed space can be considered safe for entry?

Accepted Answer

Less than 0.5% by volume (5,000 ppm) Para. 7.4 sets the CO2 exposure limit at below 0.5% by volume (5,000 ppm) before entry; if this is not achieved, the space remains unsafe. CO2 is now explicitly addressed as a major asphyxiation hazard alongside oxygen depletion.

Question 3

Under the revised recommendations, is single-person entry into an enclosed space ever permitted?

Accepted Answer

No — the company must ensure single-person entry into an enclosed space is not permitted Para. 3.11 explicitly prohibits single-person entry into an enclosed space under any circumstances covered by the recommendation.