The question is if it still works "enough" to update to a working firmware, or if it's so broken that it can only be fixed by flashing the EEPROM directly.
Yep. You just immediately killed all life in a volume larger than the ship, and since diffusion on volumes that large take time, created a plume of toxic water that will wander for many minutes before dissolving well enough.
Not a big deal on the ocean. And yeah, better than an oil spill.
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Thank you. I read that the tunnel "will link Denmark and Germany" and I had to check a map to confirm that yes, they are already linked. By land. By a lot of land. You're not experiencing memory loss.
> The Fehmarnbelt tunnel is going to be placed on a dredged tunnel trench, more than 90% of which has already been completed.
This is fascinating. I had thought underwater tunnels were always creating by boring, like the Chunnel was. But this looks like they're dredging a trench, placing cast concrete segments in it, and then filling in over the top. In order words, much like how the first subway tunnels were built a century ago on dry land, but now underwater.
I wonder how it's reliably kept waterproofed (on the span of decades or centuries)? How are the segments joined and sealed?
It is now done quite often for tunnels crossing rivers - just build the tunnel in a bay next to the river, then fllod it, float the tunnel in place and sink it to the trench, then cover with ballast and cover the trench. One of the Metro river crossings in Prague is done like that.
As for longevity - it is not that different from normal tunnels. Those also need to be often heavily waterproofed due to groundwater (under quite some pressure if you are tunneling under a lot of mountains!) and various underground springs you might tunnel into. So even "regular" tunnels that are blasted or bored often first have to fill the stabilized cavity with hydro-izolation and then actually build the actual hermeticaly sealed tunnel tube inside that out of concrete.
So the segments are allowed to fill with water, and then at the end it is all pumped out ? Or is each segment wrapped in plastic when it is dropped into place, and then they are somehow linked together without the plastic causing problems ?
I watched a couple videos, and neither explicitly stated whether the tunnels are filled with air or water when dropped. Maybe some marketing jerk put a blanket prohibition on any intimation of water in the segments. Bad vibes and all that.
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