129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
smithsonianmag.com
smithsonianmag.com
Eg, little unstable thing tethered to larger, more stable thing?
“129 year old vessel with lifeboat tethered to top it found in wherever”
People who've tried certain VR experiences know it's SUPER immersive (seriously, I had a physical adrenaline spike when I was on the edge of a platform hundreds of meters up in Vader immortal) - having that kind of experience in an educational setting is going to cause those experiences to embed, and with them, the subject being learned, far better than any book for some people.
There are regular harbor cams and freighter watching videos on Youtube. [2][3]
There is an old lake freighter open to tour. [4]
There are several good breweries (probably better quality than what would have been available peak Duluth!).
The University of Minnesota does have historical aerial survey photos of the port starting in the 1930s, but modern Google Maps satellite is probably better to get a sense of the port. [5]
If you travel up the north shore, Two Harbors is also still an active port. There's a good brewery there. And still further up the coast, there's also an old lighthouse that can be toured. [6]
Not a local, just a fan. But as a fan of history, I agree it would be so interesting to time travel.
[1] http://duluthport.com/wp-content/uploads/2022/03/2021-Tonnag...
[2] https://www.youtube.com/@DuluthHarborCam1
[3] https://www.youtube.com/@PaulScinocca
[4] https://decc.org/william-a-irvin/
It would be a sight to see. For scale, in the 1860s and 1870s Chicago was the busiest port in the US; "In 1871, more ships arrived [in Chicago] than New York, San Francisco, Philadelphia, Baltimore, Charleston, and Mobile combined" [1]. I imagine that Marquette or Duluth would have a top-10 busiest port in the US at that time - where else would all those ships be coming from?
[1] http://www.encyclopedia.chicagohistory.org/pages/300010.html
I wanna go run their ultramarathon sometime! https://www.marquettetrail50.com/
If not, maybe not. But it's what you want to listen to while reading this article.
The verse Euchre players are most likely to drunkenly sing along to names all five of the Lakes.
They also touched on how Lightfoot modified the lyrics in his song to reflect new findings, which was a very kind thing of him to do, especially when you consider that many families lost loved ones in the tragic accident.
It's an awesome dive location and enough pristine wrecks to keep you fascinated for a long time.
https://en.wikipedia.org/wiki/Fathom_Five_National_Marine_Pa...
assuming it's in similar range, that's serious depth. Way into hypoxic trimix zone (ie: you'll be breathing gas that'd kill you if you were breathing it on the surface)
Looks fascinating, but almost certainly out of reach for all but the most extreme technical divers.
It’s seriously non intuitive to a layman the whole pressure thing.
> DCS [Decompression Sickness] is best known as a diving disorder that affects divers having breathed gas that is at a higher pressure than the surface pressure, owing to the pressure of the surrounding water. The risk of DCS increases when diving for extended periods or at greater depth, without ascending gradually and making the decompression stops needed to slowly reduce the excess pressure of inert gases dissolved in the body.
DCS > Prevention > Underwater diving: https://en.wikipedia.org/wiki/Decompression_sickness#Underwa... :
> Decompression time can be significantly shortened by breathing mixtures containing much less inert gas during the decompression phase of the dive (or pure oxygen at stops in 6 metres (20 ft) of water or less). The reason is that the inert gas outgases at a rate proportional to the difference between the partial pressure of inert gas in the diver's body and its partial pressure in the breathing gas; whereas the likelihood of bubble formation depends on the difference between the inert gas partial pressure in the diver's body and the ambient pressure. Reduction in decompression requirements can also be gained by breathing a nitrox mix during the dive, since less nitrogen will be taken into the body than during the same dive done on air. [85]
Is there an issue with the above explanation?
[0] https://en.m.wikipedia.org/wiki/Nitrogen_narcosis [1] https://en.m.wikipedia.org/wiki/Oxygen_toxicity
Consequently, the partial pressure of oxygen you are breathing is doubled, to .42. This continues, until you reach a partial pressure which is incompatible with life. That danger-zone is generally considered to be between 1.4 and 1.6, so air cannot be safely breathed below about 60 meters (1.6/.21 - 1 = about 6 atmospheres). Similarly, pure O2 cannot be breathed safely below about 6 meters (1.6/1 - 1 = about .6 atmospheres).
Your description of nitrogen narcosis is correct. To dive deeper than your nitrogen narcosis limits you start replacing some of the nitrogen with helium in the gas you breathe. This works up to the limits of even the most technical recreational diving, after which you will get symptoms of something called HPNS which could mean replacing the helium itself with hydrogen.
Both helium and nitrogen will get stored in your inert tissues and will bubble out catastrophically if you ascend too quickly. With either inert gas you must carefully plan your ascent to avoid the bends.
I'm not going to link to the Byford Dolphin incident, because it would need a [TW] and I hate that shit, so you can just google it yourself. The 30-second rundown is that on the surface divers live in a very strong steel tank pressurised to the same degree as they would be on the seabed, so maybe make sure you close the door properly.
Incidental, and didn't get the chance.
Crammond opened the clamp that was keeping the trunk sealed before Diver 4 (Hellevik) could close the door to the chamber.
The equipment did have interlocks to prevent it being opened incorrectly but nobody used them because they were annoying and fiddly.
Diving that deep isn't going to become easier anytime soon. But have a look at the consumer-grade "underwater drones", formerly called ROVs. I wouldn't be surprised to see people in small boats doing youtube videos of such wreaks in a couple years.