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Barwon Heads is exposed to the ocean, Bass Straight so can be very rough with big waves under poor conditions. Rye pier is inside Port Phillip Bay and not exposed directly to the ocean, and usually fairly calm waters. As stated in the previous post, two different pieces of water, and conditions.

He was a rebreather diver using (I believe) a Mares Horizon rebreather in a Waterproof drysuit. I have been told he was an experienced diver. As its too shallow to tox out on oxygen, it was either low O2, CO2 hit or a medical event I would think? All just guesses until the coroner completes...

PPO2 at 160' 32NX is 1.88, ah damn should have read everything before replying. All sorted?

Totally agree with your thoughts. The reality is that about 20-25% of the population has some sort of PFO, and I would suggest that only a small % of that number know that they do. Often for the person there are no or little symptoms that would indicate that medical condition. Its only when they...

One issue that will arise is that if you say just leave your computer on air, and disregard that you have actually switched, whilst for deco purposes, it helps you have to be careful not to get an oxygen hit, in particular if the dives are very long. This is more so when running high levels of...

Unfortunately the first time we couldn't get anyone interested in helping. We were told we had to go to a doctor to go to the local chamber at the navy depot at Bruni. Saw the doctor and he said just a rash, said she has pain, rash and itchiness, he prescribed antihistamines, and panadol. I...

The problem with DCS is whilst we know things that will cause it, the evil is that it can happen for no apparent reason. I have one friend who I did my tech courses with in cold water down to 60m deco on mixed gases using the same algorithm, all good. We went to Chuuk Lagoon and did two simple...

Thank you for the information. And yes I agree I think that incident was a tech dive which sadly went wrong, and to make it even sader, it looks like no one will ever know why it happened. I happened to mention in my previous post that it appeared that it was a tech dive, however I though it...

Whilst I don’t know the details of this tragedy and if it was a tech dive or recreational dive gone wrong I would make this comment as a general statement for anyone contemplating deep diving with little or no training. Sad part is that diving to 100m is not super dangerous, as long as you know...

------------------------------------ My opinion; Whilst the instructor is responsible for everything in the dive, he may ask you to go through the process of making available a drop tank for the dive. However he is responsible for the dive and your instruction at all times. Based on that he...

How long after the dives? The reality is that often divers complete a dive and then get into a car and whilst going home climb mountain roads to 2000 ft or so. I personally wouldn't be to worried as long as there is some time before the flight, I hadn't had any issues with the dive like a quick...

Yes thats what I do, but my point being to highlight a flaw where one can lose a lot of oxygen trying to manually raise PPO2 in ascent if it isnt done properly. Something like this in a panic or less than ideal situation could cause a low PPO2 and blackout. Not with all breathers but in some...

My breather adds gas as you said, under the inhale side canister, via a solenoid and via the DIL valve. However if I manually add gas, DIL or Oxygen, it goes into the loop via a port on the loop relief valve. I would have expected it to have a tube directing it to the same place where the O2...

So true "There but for the grace of GOD go I"

And there is the rub. You are dumping from the loop because as you ascend, the loop volume grows, but at the same time the PPO2 drops so you have to add oxygen. So you are adding gas and dumping gas at similar times. If your unit is badly designed and the oxygen add outlet is near the dump or...

A question for you, have you ever had a CO2 hit? Are you speaking from experience or from what you know? I am not trying to be smart ro have a go at you, but I ask for the following reason. I have never had a CO2 hit but have had a caustic hit. I have however had a friend who had a CO2 hit...

As always, some people have the certification but not the ongoing skills, or the character to be a good diver. I agree, but if you have the money, anyone can get to Bikini. Chuuk is much cheaper, thus in the scope of recreational divers, Bikini being 4 to 5 times the cost of Chuuk, weeds out...

Yes the other CCR diver was experienced. Yes my thoughts at the time when I looked at the entrance was there are too many to do this dive safely, hence why I stayed at the entrance and didnt penetrate. The bad part of this was the buddy, who not only caused the issue, then (I believe) paniced...

Get used to it. They do that in most 3rd world dive sites. It is more the norm than you think. Did everyone have at least 2 lights, I suspect not. Was there only one dive guide at the front, probably so. Were there lines run, I bet not. All it needs is for a new diver to panic and it can all go...

Ever tried to unscrew a scuba tank valve with 10 BAR in it? The pressure lockes the thread, regardless of if it is loose when empty or not so I would think it would be near impossible to unscrew the valve past the point where it comes out. However some commercial tank valves have tapered thread...