“Incidents in enclosed spaces remain among the most preventable causes of fatalities at sea”
What does a successful rescue entail?
A successful enclosed space rescue depends on replacing the impulse to rush in with disciplined, methodical action and strict adherence to emergency procedures. Key requirements include:
- Proper equipment: Only trained personnel equipped with self- contained breathing apparatus (SCBA) should enter the space.
- Rescue equipment ready: Harnesses, lifelines, and communication devices must be available and set up at the entry point before any entry.
- Designated attendant: An attendant should remain outside the space to coordinate and monitor the rescue operation.
- Clear rescue plan: A well-communicated rescue plan with clearly defined roles for all involved is essential.
- Effective communication: Maintain constant communication between rescuers, attendants, and command throughout the operation.
- Realistic drills: Regular, realistic rescue drills ensure the crew can instinctively follow procedures under pressure.
- No impulsive entry: Unplanned or impulsive entry must never be allowed—always pause, assess, and follow the established rescue protocol.
The time the rescue team has is critically dependent on the atmosphere inside the enclosed space, as different gases have varying levels of fatal readings and time-to-effect. For example, when oxygen concentration drops to 6–8% by volume, exposure can be fatal within eight minutes; if oxygen falls below 6%, a person may lapse into a coma within a minute, as highlighted in Singapore’s Technical Advisory on Working Safely in Confined Spaces. Therefore, it is strongly recommended that time-based objectives be incorporated into enclosed space entry drills, so that crew members fully understand the urgency.
In the case study mentioned, several factors contributed to the successful rescue, as per the vessel’s Managers. The casualties were located on the top platform, which significantly eased the complexity of the physical rescue compared to a recovery from a lower level in the tank. Timely intervention was also facilitated by the slop tank's proximity to the SCBA storage locker, minimizing retrieval time. The swift donning of the SCBA by the Third Officer under stress demonstrated effective training, and the medical oversight provided immediately post-rescue, in conjunction with remote consultation from the company-appointed doctor ashore, ensured proper care and full recovery.
Key take-aways
Incidents in enclosed spaces remain among the most preventable causes of fatalities at sea, yet they persist, often claiming the lives of well- intentioned rescuers. This case study and supporting data underscore a critical truth: safety must take precedence over instinct. Breaking the cycle of impulsive rescue attempts requires unwavering adherence to established procedures, proper use of equipment, and realistic, scenario- based training.
The challenge is twofold: ensuring that drills and training are robust and consistently implemented, while addressing the human factors that drive individuals to act impulsively, sometimes with tragic consequences. Equally important is fostering an organisational culture that truly empowers people to pause, speak up, and prioritise safety over urgency.
Drills and briefings should explicitly acknowledge the natural rescue instinct and rehearse resisting it. In a real emergency, the first reaction must be to follow the plan and not rush in, so that every crew member has the best chance of returning home safe.
THE REPORT | MAR 2026 | ISSUE 115 | 87
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