Dutch coastguard said it was trying to locate 26 empty shipping containers lost in the North Sea.

I must admit to a bit of confusion about floating containers. Clearly they sometimes do float and are an absolute menace when they do, particularly as they float so low. But those doors don't look like a perfect seal against immersion in water. Would a container normally fill and sink unless it contained buoyant cargo (maybe things in polystyrene packaging?) sufficient to float a couple of tonnes? Or do they trap enough air to float even when part flooded somehow?
 
I must admit to a bit of confusion about floating containers. Clearly they sometimes do float and are an absolute menace when they do, particularly as they float so low. But those doors don't look like a perfect seal against immersion in water. Would a container normally fill and sink unless it contained buoyant cargo (maybe things in polystyrene packaging?) sufficient to float a couple of tonnes? Or do they trap enough air to float even when part flooded somehow?
Perhaps we can be reassured?
 
I must admit to a bit of confusion about floating containers. Clearly they sometimes do float and are an absolute menace when they do, particularly as they float so low. But those doors don't look like a perfect seal against immersion in water. Would a container normally fill and sink unless it contained buoyant cargo (maybe things in polystyrene packaging?) sufficient to float a couple of tonnes? Or do they trap enough air to float even when part flooded somehow?
Another forum member who is in the container moving trade has posted at length on this subject before
 
I suppose it also depends where they sink, if they sink in shallow water which is deep enough to just cover them that could also be a danger
 
Another forum member who is in the container moving trade has posted at length on this subject before
Yes; he stated that they are designed to sink, as far as I recall. The only way they can float long term is is they are filled with buoyant material - but that isn't at all unlikely given the prevalence of buoyant packaging materials such as expanded polystyrene, bubble wrap and the like. And, of course, many manufactured goods may well be sealed well enough to float, at least in the short term. Refrigerated containers can also remain floating.
 
My interest was the hazard to small boats. I wouldn't want to venture out before they've all been accounted for.

Given the sizes of containers, small boats and the North Sea, the chances of encountering one are rather less than other hazards you would routinely encounter.
 
I suppose it also depends where they sink, if they sink in shallow
Given the sizes of containers, small boats and the North Sea, the chances of encountering one are rather less than other hazards you would routinely encounter.
Thank you, but I would only accept that logic for the situation up until now. The headline I quoted refers to to 26 containers lost from one ship, but after the recent storms I would expect to find a lot of rubbish floating about, some of it dangerous.
 
With the normal currents all the Dutch have to do is walk along the coast, any that still float will likely get washed up there..
 
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