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An Almost Invisible Phenomenon in Maritime Transport Turns Solid Ore Into an Unstable Mass, Causes the Capsizing of a 190-Meter Freighter, and Triggers an International Alert About Naval Safety
On the night of January 22, a distress call interrupted the routine of the coast guards of China and the Philippines. The bulk carrier Devon Bay, flying the Singaporean flag, was sailing through the South China Sea when it suddenly lost stability. A few minutes later, the vessel capsized and sank, resulting in two confirmed deaths and four crew members missing among the 21 on board.
The incident shocked maritime authorities and reignited a little-known technical debate outside the naval sector: the cargo liquefaction phenomenon, capable of turning solid ore into a fluid and extremely dangerous substance. Although rare in the eyes of the public, this process has caused dozens of serious accidents in recent decades and remains one of the biggest hidden risks of global maritime transport.
The information was disclosed by UOL in the column Sea Stories, which detailed the final moments of the vessel and the technical factors behind the sinking, according to official reports and analyses by industry experts.
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What Is Cargo Liquefaction and Why Is It So Dangerous
First of all, it is important to understand how the phenomenon works. Liquefaction occurs when bulk solid materials — such as nickel ore, bauxite, fine coal, or certain types of sand — absorb moisture above the safe limit. In this scenario, constant vibrations typical of navigation cause the water among the particles to drastically reduce the internal friction of the material.
As a result, the cargo ceases to behave like a solid and instead acts like a viscous liquid. Thus, rather than remaining stable in the holds, the material shifts laterally with each movement of the ship. Consequently, the center of gravity of the vessel abruptly changes, compromising stability.
Moreover, unlike liquid cargo transported in tanks designed for this purpose, the holds of bulk carriers do not have containment systems for improvised fluid masses. Therefore, once liquefaction begins, the process is often irreversible. In many cases, the ship lists within minutes, with no time for corrections or complete evacuation.
In the case of Devon Bay, preliminary investigations suggest that the cargo loaded in the Philippines may have exceeded the moisture limits permitted by international regulations, which may have triggered the structural collapse.
How the Phenomenon Affects Global Maritime Trade Safety
Currently, about 90% of international trade depends on maritime transport. Within this universe, bulk carriers play a central role in the flow of essential raw materials for steelmaking, energy, and construction. However, precisely because they operate with loose cargo, these vessels face specific risks that do not always receive the necessary attention.
Although there are strict rules, such as the IMSBC Code (International Maritime Solid Bulk Cargoes Code), enforcement still faces challenges. In many ports, especially in tropical regions, the accurate measurement of cargo moisture is inadequate. Additionally, commercial pressures lead operators to load materials even in unfavorable weather conditions.
Consequently, accidents like that of the Devon Bay are not isolated cases. Data from maritime organizations indicate that, in recent decades, dozens of bulk carriers have sunk due to cargo liquefaction, resulting in hundreds of deaths. Nonetheless, the subject remains little discussed outside technical circles.
On the other hand, each new incident reinforces the need to improve protocols, invest in real-time monitoring sensors, and enhance crew training to recognize early signs of instability.
An Invisible Risk That Requires Constant Attention
The sinking in the South China Sea exposes a concerning contradiction. While naval technology advances in navigation systems, automation, and energy efficiency, a basic physical phenomenon, known for decades, still manages to bring down steel giants in a matter of minutes.
More than an isolated tragedy, the case of the Devon Bay serves as a silent warning to shipowners, port authorities, and governments. After all, as the world increasingly relies on the continuous flow of commodities, the safety of this system necessarily depends on respecting physical limits that do not allow shortcuts.
Ignoring cargo liquefaction does not only mean taking financial risks. It means, above all, putting human lives at risk on maritime routes that sustain the global economy.
Do you think maritime trade is prepared to deal with invisible risks like cargo liquefaction, or can new tragedies still happen?
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