Rebreather Incident 2 - Incident

[Tommo69O2]

Started using rebreathers in 1959, O2 and nitrox, Pendulam breathing, and we knew the limitations then on proto. Would like to know what the gas mix is, used in the movie. Seems as if training has slipped, some of the professional statements were a bit strange as well. And what happened to emergency surfacing?

[georgekeenan]

Carry some bailout, dipweed.

[FantasticBob7000]

Seems to me they should've had him on an octo right away before even beginning their ascent. Don't understand that part. 

[97Arran]

 Lucky it was only 20m if it was 60 with no stages i rekon he would not be here today for sure.

[h3lm92]

haha, look at 3.59 : Int ass of nitrox.

Yeah, that was childish...

- Anyway great video! =D

[Chuckjagermeister]

Ugh. if that is (I hope) a mock dead body. It's kinda tasteless. Why didn't they just use a mannequin or something? If it is a dead person they should blur it electronically or something. As a diver that's one of the grossest things you could ever encounter.

[howlettman]

whats the difference between re breather and scuba tank??? can you re breath forever with a rebreather and never run out of shit?

[rmeglath]

When diving a normal open circuit scuba tank all of the gas inhaled is exhaled into the surrounding water. The air we breathe is about 21% O2 when we exhale there is still about 16% O2 left which is then wasted. On a rebreather the exhalation is captured, the CO2 is chemically removed in the "scrubber" and additional O2 is added (it's a bit more complicated). The scrubber's life is limited as is the gas in the diluent and oxygen cylinders. Max time on that unit is about 4-6 hours I think.

[cue1go]

They're only 20m down. Why use a rebreather? They could have completed the segment with air. Even easier with Nitrox. Why go through all the complication of a rebreather!

[Chuckjagermeister]

Yeah, I didn't understand that either. I thought it was a deep dive in the beginning of this segment but it's at air-range depth. No need for a rebreather.

[Baddeco]

There's a lot of difference if you are a rebreather diver or open circuit. OC is damn reliable in comparison but tosses loads of limitations considering the dive time. One of the most intresing things is that buoancy control of rebreather closed circuit is different than OC. Thus if you are accustomed to the rebreather you probly want to use it. Also if you are videoing things rebreather makes less noise and no bubbles if it's CC. To complicate;There are also semi closed circuit rebreathers.. :)

[Samurailord]

my guess would be the extended bottom time. If they are down there for a couple of hours they would've needed to carry many cylinders of nitrox with them.. too much baggage. Plus the Reb is more comfortable.

[sariatti]

Thay are fighting around the camera 1:45-2:05

If somebody made similare with me, i know im wrong place in wrong time...

The others its more tragic, how its possyble: 3 divers and not hawe 1 SCUBA (open breathing system) bail out???

Around the decompression deep???

Sari Attila

[Dreaded88]

Now imagine what would've happened if he mistook Kitty Litter for the Soda-Lime for the rebreather!?!

Just kidding, but seriously folks: is there anyway to take used Soda-lime, and recharge it?

[zaboka99]

This is where humility comes in and one ends the dive at the first sign of trouble especially with a rebreather. The other divers were certified divers, regardless of experience level they clearly knew and saw something was wrong thus the dive should have ended immediately, just my thought.

[fantaseatec]

Just one more thing military scruber material is also different, it has up to 40% sodium hydroxide and potassium hydroxide (active ingredients, this for longer bottom time and use)which is not the case in normal diving where its about 4 to 5 % only, this to avoid the sudden and massive caustic cocktail (would never pass a EU norm test for normal scuba diving)and honestly I never heard or saw in my life military re-packing scruber material. We had sealed scruber canisters that we had to give back

[sharkdinner]

This "widely used practise" seems to do a good job of hiding. I've never seen it, nor has anyone else I've asked.

[tannalv]

The key here is mentioned in the report, "this dates back to the military that emptied the canister onto a poncho, let it dry, and reused it".

It is probably "common" in a small area, where someone has been taught this from the military.