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BSafe Case Study 21 — Thirteen Days Between a Headache and a Death

🕑 5 min read words Safety • Incident

Vessel: Bulk carrier, carrying nickel ore
Date & location: Off the western coast of Africa, en route toward Mauritius
Outcome: Fatal — a 34-year-old deck cadet died 13 days after inhaling hydrocarbon vapours from a fuel tank vent
Human factors: Symptom Severity Misjudged · Delayed Escalation to Real Medical Care · Assumption That Rest Would Resolve It
Source: Britannia P&I Club, BSafe Incident Case Study No. 21, drawn from Marine Safety Investigation Report, Transport Safety Investigation Bureau (TSIB), Singapore

1 real case studyTSIB Singapore~4 min read

Fifteen Minutes Near a Vent

The chief officer assigned the fitter to repair work in cargo hold No.5, with the deck cadet assisting. Both noticed a strong smell of fumes from a nearby heavy fuel oil tank vent before starting. The job took 15 to 20 minutes; the cadet spent it passing equipment into the hold while standing near the vent, and came out afterward saying he felt uncomfortable.

The next day he told the chief officer he had a headache, which he put down to the fumes. He was advised to rest. The master was informed. Over the following days his condition worsened — reduced appetite, diarrhoea. The company arranged medical advice by phone: the guidance was a ‘light diet.’

A Decision Deferred, Then Deferred Again

Nine days after the exposure, with the cadet now also experiencing dizziness and vomiting, the master contacted the crewing manager to discuss signing him off in Mauritius — four days away by the ship's ETA. A plan was made for a second officer to accompany the sign-off and for onshore medical care to be arranged on arrival. Encouragement to eat and further remote medical advice continued in the meantime. His condition kept deteriorating.

Thirteen days after the original exposure, another cadet checking on him every two hours found him unresponsive. CPR was started. He did not recover.

What Went Wrong, in Sequence

A genuine exposure — strong fumes, acknowledged by the crew before the job even started — was followed up with rest advice, not a formal assessment of what had actually been inhaled or its likely effects.
Worsening symptoms over several days (headache, then reduced appetite and diarrhoea, then dizziness and vomiting) were each treated as the current problem to manage, rather than read together as a single, deteriorating trend.
The decision to get the cadet ashore was made, but tied to the ship's own ETA in Mauritius rather than to how quickly his condition was actually declining — four more days elapsed between that decision and arrival.
Remote medical advice was sought and followed, but the case shows how easily ‘rest’ and ‘light diet’ can become the default answer when the person giving remote advice has less real-time information than the officers actually watching the patient decline.

Recommended Actions

Not invented — what this sequence points to directly:

A known chemical/fume exposure should trigger a structured medical assessment at the time, not just symptomatic advice once a complaint is raised the next day.
A worsening symptom picture over several days needs to be tracked as a trend, not re-assessed fresh each time — a headache, then GI symptoms, then dizziness is a trajectory, and trajectories are what should drive escalation decisions.
Once a decision to evacuate or land a crew member is made, the ship’s own schedule shouldn’t be the default timeline — the deciding question is how fast the person’s condition is actually changing, which can call for a diversion, not just ‘next scheduled port.’
Remote medical advice is only as good as the information behind it — officers on scene need to actively push a full, honest picture of the deterioration, not just the latest single symptom, when they call in.

Human Element Analysis

Symptom severity misjudged

Every individual decision along the way — rest, then a light diet, then a planned sign-off in four days — looked reasonable in isolation. None of them, in sequence, matched how quickly the cadet's actual condition was declining.

Delayed escalation

By the time evacuation was seriously discussed, nine days had already passed since the exposure. The gap between ‘this needs real medical attention’ and actually arranging it is where this case turned fatal.

Anchoring on the initial explanation

The headache was attributed to the fume exposure from day one, and later symptoms were largely folded into that same explanation rather than treated as a reason to reconsider what was actually happening to him.

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