Ukraine Invasion - Please do not post videos showing attacks/similar

[Jokester]

How did they manage the decompression time, 360ft is Saturation diving depths, I tried finding a calculator that made sense to my non diving brain, but surely you're looking at least hours of decompression if not days ?

Looking around it would take ~4.5 days approximately, so you're not doing that outside a decompression chamber.

Saturation Diving

Saturation diving is when the diver breathes in inert gas, it dissolves into the body's tissues and reaches equilibrium with the ambient pressure at the diver's depth.

dan.org

 

[Minusorange]

I guess this yacht could have a decompression chamber and a bell, but it seems abit of a reach for a non government group to pull off

 

[dlockers]

Whole thing seems suspect to me. The whole operation needs significant resources, training and experience to pull off.

I guess this yacht could have a decompression chamber and a bell, but it seems abit of a reach for a non government group to pull off

It is a very oddly specific list of attendees as well... 5 men, 1 girl... doctor etc.... very odd.

 

[Rroff]

It is a very oddly specific list of attendees as well... 5 men, 1 girl... doctor etc.... very odd.

Doctor is pretty much a given mind with the activity.

 

[Grim5]

How did they manage the decompression time, 360ft is Saturation diving depths, I tried finding a calculator that made sense to my non diving brain, but surely you're looking at least hours of decompression if not days ?

Plus that earlier reports indicated explosions may have happened from within the pipe not outside

 

[Dis86]

Plus that earlier reports indicated explosions may have happened from within the pipe not outside

May have. Not did.

 

[Rroff]

Things getting a bit warm in Georgia I see - mass protests due to law changes.

EDIT: Possibly looks like pro-Russian elements of the Georgian government have tried to take advantage of the president being out the country to push through a law change which would be in Moscow's favour.

 

[darrant1234]

Looking around it would take ~4.5 days approximately, so you're not doing that outside a decompression chamber.

Saturation Diving

Saturation diving is when the diver breathes in inert gas, it dissolves into the body's tissues and reaches equilibrium with the ambient pressure at the diver's depth.

dan.org

360 ft or 109metres can be done without a chamber all depends on time at the bottom. I’ve done 20 mins bottom time at 70m and deco was around an hour and a bit. 100m would be more obviously but do able.

4.5 hours is saturation diving. I.e your body gets so much nitrogen or helium in it can’t take anymore so the deco time never gets longer. Means you can spend weeks at depth and still only do the same deco.

 

[Jokester]

360 ft or 109metres can be done without a chamber all depends on time at the bottom. I’ve done 20 mins bottom time at 70m and deco was around an hour and a bit. 100m would be more obviously but do able.

4.5 hours is saturation diving. I.e your body gets so much nitrogen or helium in it can’t take anymore so the deco time never gets longer. Means you can spend weeks at depth and still only do the same deco.

So it could be done? If all you're doing is putting explosives down, it wouldn't require much time down there.

 

[darrant1234]

Yeah if the idea was to drop down a line do the work then head back up. Not easy diving though and takes loads of training. for the 70m diving I used to have a twin set and 3 deco cylinders before I moved onto closed circuit rebreathers. Again more training! Anyone daft enough to try without training would end up hurting themselves or dead.

 

[Fuzz]

Whole thing seems suspect to me. The whole operation needs significant resources, training and experience to pull off.

How did they manage the decompression time, 360ft is Saturation diving depths, I tried finding a calculator that made sense to my non diving brain, but surely you're looking at least hours of decompression if not days ?

I don't know what you lot are looking at but I've been in a quarry in Wales with guys at that depth on a rebreather... There is not days of recompression, that's a well planned day dive possibly more than one.
I think you are possibly mixing up ft and metres..!!

 

[darrant1234]

I don't know what you lot are looking at but I've been in a quarry in Wales with guys at that depth on a rebreather... There is not days of recompression, that's a well planned day dive possibly more than one.
I think you are possibly mixing up ft and metres..!!

dorothea or ndac. Both good dives sites but yeah do able dives to 360ft. If the pipe was 360m then it’s much tougher.

 

[Rroff]

I don't know what you lot are looking at but I've been in a quarry in Wales with guys at that depth on a rebreather... There is not days of recompression, that's a well planned day dive possibly more than one.
I think you are possibly mixing up ft and metres..!!

My comment was including the diving operation, demolition and other subterfuge/covert aspects, etc.

 

[Fuzz]

dorothea or ndac. Both good dives sites but yeah do able dives to 360ft. If the pipe was 360m then it’s much tougher.

Dorothea.

 

[darrant1234]

Dorothea.

used to love dotty. Used to go at least twice a month. 57m tunnel on air was fun lol.

Anyway not sidetracking the thread, hope Ukrainians kick Russia out asap!

 

[Fuzz]

My comment was including the diving operation, demolition and other subterfuge/covert aspects, etc.

You are mostly limited in dive time by the co2 scrubber, (basically special gravel to the layman lol) but you can do 3hrs on most retail rebreather systems, possibly more on commercial ones. The gas (volume) isn't a problem as such as that has the capacity to last 6 ish hours..
You are absolutely right that there are limitations by your central nervous system but that can be mostly offset by the type and mix of gas you breathe.

 

[darrant1234]

You are mostly limited in dive time by the co2 scrubber, (basically special gravel to the layman lol) but you can do 3hrs on most retail rebreather systems, possibly more on commercial ones. The gas (volume) isn't a problem as such as that has the capacity to last 6 ish hours..
You are absolutely right that there are limitations by your central nervous system but that can be mostly offset by the type and mix of gas you breathe.

You run a lower ppo2 or set point on a rebreather to limit that and take air breaks on the deco stops to limit your cns 02% levels. This would lengthen the deco a bit tough. My rebreather scrubber was recommended for 3 hours I think but people had done 7plus hours on them. Bail out gas is also a consideration incase of failure

 

[Mercenary Keyboard Warrior]

Rumour is Ukraine going to make a breakthrough from North and come in from behind and trap Russians inside Bakhmut, Wagner said there multiple Ukraine units around and they are complaining about ammo we shall see.

I personally dont get why an offensive hasnt been made like Kharkiv to release pressure of Bakhmut spreading Russians forces thin like has been very sucessful in the past.

Mud
They dont want to replicate what Russia did last year

Sooner or later the yooks will go, they know when the time is right

 

[Minusorange]

So how long would it take at 360feet to locate the pipe and set the explosives properly ? Is visibility an issue in the sea at that depth ?

 

[darrant1234]

So how long would it take at 360feet to locate the pipe and set the explosives properly ? Is visibility an issue in the sea at that depth ?

I think the pipe is in Baltic Sea. I’m sure the vis there is quite good but that can be subjective. If the cos is good should be easy to see when down. If the skipper uses gps and drops a line with heavy weight which heads straight down they should be able to get it very close. They could also have the fish finders which scans down and you can see the outline of wrecks etc. if the pipe stands up out of the floor could be found with this too.