129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
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Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#2I'd love to dive there someday.
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#3It would be awesome to go back in time and see some of these remote port cities in their heyday (such as Marquette, Duluth).
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#4It would be awesome to go back in time and see some of these remote port cities in their heyday (such as Marquette, Duluth).
https://nmgl.org/great-lakes-historical-society/ has some content and photos but it wouldn't be anything like actually being there.
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#5I'd love to dive there someday.
The NOAA page on the wreck (https://thunderbay.noaa.gov/shipwrecks/ironton.html) just has depth listed as "TBA", but the Ohio that it collided with is in >100m.
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.
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#6I'd love to dive there someday.
The NOAA page on the wreck ( https://thunderbay.noaa.gov/shipwrecks/ironton.html ) just has depth listed as "TBA", but the Ohio that it collided with is in >100m. 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 techni…
Crazy how 100m is such a short distance in most walks of life except for underwater.
It’s seriously non intuitive to a layman the whole pressure thing.
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#7Earlier quoted context omitted.
The NOAA page on the wreck ( https://thunderbay.noaa.gov/shipwrecks/ironton.html ) just has depth listed as "TBA", but the Ohio that it collided with is in >100m. 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 techni…
Crazy how 100m is such a short distance in most walks of life except for underwater. It’s seriously non intuitive to a layman the whole pressure thing.
https://en.wikipedia.org/wiki/Decompression_sickness#Ascent_... :
> 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]
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#8I'd love to dive there someday.
The NOAA page on the wreck ( https://thunderbay.noaa.gov/shipwrecks/ironton.html ) just has depth listed as "TBA", but the Ohio that it collided with is in >100m. 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 techni…
I’m not a diver; but the physiology of these depth effects is fascinating! TIL that these hypoxic mixes are needed because of a combination of two effects: nitrogen narcosis[0] and oxygen toxicity[1]. The former is due to diffusion of any gas, apart from helium, into neurons in the CNS under high pressure, while the latter is due to the raised partial pressure of O2 at depth. 100% O2 is cumulatively toxic at sea level, but at depth its toxicity is enhanced at what would be a normal 21%. At least that’s my layman’s understanding.
[0] https://en.m.wikipedia.org/wiki/Nitrogen_narcosis [1] https://en.m.wikipedia.org/wiki/Oxygen_toxicity
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#9Thus bugs me a bit.
Shouldn't it be "lifeboat tethered to it", not "it tethered to lifeboat"?
Eg, little unstable thing tethered to larger, more stable thing?
Re: 129-year-old vessel still tethered to lifeboat found on floor of Lake Huron
#10Thus bugs me a bit. Shouldn't it be "lifeboat tethered to it", not "it tethered to lifeboat"? Eg, little unstable thing tethered to larger, more stable thing?
Was about to say the same thing. I thought Simone had editorialised the title but no it’s there in the Smithsonian’s Version.
“129 year old vessel with lifeboat tethered to top it found in wherever”