Overloaded Congo ferry capsizes - GIF

Overloaded Congo ferry capsizes.

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Previously:

Boat capsized by huge wave - GIF
Sailing yacht capsized by strong gust - GIF
Salvaged section of a capsized car carrier - GIF

probably preventable as it wasn't listing at the start of the video...

I'm wondering if a ballast transfer valve might have malfunctioned

Too many people on one side.

Thats a tragedy, as most are unable to swim.