Sassari – No signs of injury, no trace of violence. The autopsy on the body of Giovanni Marchionni, 21, a skipper originally from Bacoli, ruled out the possibility of assault in his death aboard a yacht docked in Marina di Portisco, on the Costa Smeralda.
The examination, performed at the Sassari Institute of Forensic Medicine, confirmed that the young man had not taken drugs, did not suffer from any cardiovascular disease, and had not suffered a heart attack. "His health was perfect," clarified the family's lawyer, Maurizio Capozzo. "He was there to work."
The cause of death remains to be clarified. The most likely hypothesis, pending the results of chemical-histological tests on tissue samples, is that of toxic fumes, perhaps coming from the vessel or from the chemical toilets on board.
Investigators are interviewing witnesses who, in the hours before the body was found, reportedly perceived a pungent odor in the port area.
The body will leave Olbia tomorrow evening for Bacoli. The funeral will be held on Friday afternoon, August 15th, in the Church of San Gioacchino.
Giovanni Marchionni's Last 24 Hours
The sequence of events preceding the Portisco tragedy
Tuesday, August 12 – morning
Giovanni Marchionni, 21, is aboard the yacht docked in Marina di Portisco, Costa Smeralda. He's completing some onboard tasks.
12 hours: 00
Some colleagues see him performing routine checks inside the cabin. Nothing suggests an imminent illness.
Afternoon
The yacht remains docked in port. Some operators notice a persistent, acrid odor in the area, but the source is unclear. No formal report is filed.
20 hours: 00
Giovanni retreats to his cabin. There are no phone calls or unusual messages in the hours that follow.
Wednesday, August 13 – 7:30 PM
The flight crew noticed the young man's absence during the early morning activities.
8 hours: 00
The cabin door opens: Giovanni is lying lifeless. The emergency services are called.
9 hours: 00
The Carabinieri and Coast Guard arrived on the scene. There were no signs of a struggle.
Day
The body was transferred to Sassari for an autopsy. Initial hypotheses: illness, overdose, or violent death.
Thursday, August 14 – afternoon
The autopsy rules out heart attack, injuries, and drug use. The trail of toxic fumes.
When fumes become lethal
The hidden risk in cabins and chemical toilets on boats
The enclosed spaces of a boat, especially below deck, can become silent traps if toxic vapors or gases are not detected and dispersed in time.
Origin of the fumes
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Chemical toilets: they release ammonia vapors and other irritants, which in confined spaces can reach dangerous concentrations.
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Engines and on-board systems: possible fuel leaks or defects in the exhaust can release carbon monoxide, an odorless, colorless gas that causes hypoxia within minutes.
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Materials and solvents: paints, glues and detergents used for maintenance can release volatile organic compounds.
Why are they dangerous?
Carbon monoxide binds to hemoglobin, preventing the blood from carrying oxygen. Prolonged exposure, even to low concentrations, can cause drowsiness, confusion, loss of consciousness, and death. In a confined space like a cabin, accumulation is rapid and often imperceptible.
How to prevent them
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Install gas and CO detectors in indoor areas.
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Ensure constant ventilation, even in port.
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Carry out periodic checks on exhaust systems and ventilation systems.
It's truly tragic that something like this could happen, but I wonder if there were any checks before this situation. Toxic fumes are a serious problem that should be more carefully considered on all vessels.