Can't believe they sell this to people who are not trained.

[GerritS]

https://www.outsideonline.com/1922711/raising-dead

Quite an interesting read about "Raising the dead" at Boesmangat.

[JohnnoK]

Yeah look I don't think this is intended to be used for deep divers. I think it's for people snorkeling and that's about it. I've also seen surfers who do those massive waves keep something similar (but smaller) on hand just for a few minutes of air when a big wave rolls and keeps them under.

Anyone know where one can find this in SA? I would LOVE one. My biggest annoyance with snorkeling is having to go up for air when I'm under, and I never go deeper than around 2~3m anyway. I can't seem to handle the pressure...

That is the big problem with those things...you'll be lucky to get a minute in controlled conditions.
We tested our ones in the pool we use for our HUET training and a highly trained ex Navy Diver struggled to surface with a significant amount of left over air.

[Olyfboer]

That is the big problem with those things...you'll be lucky to get a minute in controlled conditions.
We tested our ones in the pool we use for our HUET training and a highly trained ex Navy Diver struggled to surface with a significant amount of left over air.

And an untrained person taking a breath between 2- 3 metres deep and surfacing afterwards stands a significant chance of critical life threatening injuries.

[JohnnoK]

And an untrained person taking a breath between 2- 3 metres deep and surfacing afterwards stands a significant chance of critical life threatening injuries.

And, the instinct is to hold your breath because air IN your lungs is much more useful than exhaled air.
This is not going to be good for a number of people.

[moetbiedjiewegkom]

Almost an exact copy of the SpareAir which retails for about R5k.


At 3cu ft volume, that thing will give you ~50 breaths on the surface. Assuming you're at rest, generally breating 5 breaths per minute, that's 10 minutes. Realistically, you're exerting yourself somewhat and you're not going to get more than about 6 minutes. ON THE SURFACE!


Double the ambient pressure (down at 10 meters) and you've just halved your available air. Consider that you're now swimming and exerting yourself. You'll be lucky to get 2 to 3 minutes out of it.


These things are designed as a self rescue aid for the idiot who runs out of air while on SCUBA. On the surface, what's the point? You might as well use a snorkel. At 10 meters, what's the point? I can hold my breath almost as long as that thing would last anyway.

Seriously. Do not buy this crap. If you don't know why you shouldn't buy it, then you definitely shouldn't buy it.



Well... I'm still alive after diving alone at least twice a month for a few years.

Then again, I'm not a holiday diver.

Spot on, I have 10 Spare airs I imported a while back on a bulk offer. They are meant to be used as an emergency backup. I thought they would be great to use in the estuary at our place in Pomene, but with the constant filling we find ourselves preferring simple snorkeling with fins, mask and snorkel. We filled them from our 80L air bank, while this model has an additional handpump, it looks like a huge effort to do so by looking at the vids.

[Rainier Vermaak]

https://www.outsideonline.com/1922711/raising-dead

Quite an interesting read about "Raising the dead" at Boesmangat.

What a brilliant read.

[Robbief]

duplicate.

[Robbief]

Will it inflate a average 4x4 tire or more, with the correct pipe fitting of course.

[peter bee]

its spare air, its meant to give you a few breaths, thats it, find a mate grab his air or whatever, its not meant to dive with as a dive cylinder, its emergency air for a few breaths depending on your depth. something goes wrong you have a back up.

[WayneB]

For those who dont dive this is how a person can kill themselves:

On the surface you breath air at 1bar pressure
10m deep you breath air at 2 bar pressure
If you use the emergency bottle at 10m, take it out your mouth and surface without breathing out, you will pop your lungs because you will will arrive at the surface with air pressure in your lungs 1 bar above ambient.

Popped lungs = dead

A number of years back there was a couple visiting the Red sea. The husband was a certified diver, the wife just snorkelled.
One day he was diving shallow and she was snorkelling above.
She dived down to him and took a breath from his regulator. She then ascended without breathing out.
She died

[peter bee]

on the service you have six liters of air in your lungs.
at ten meters you have twelve liters of air,
at twenty meters you have twenty four liters of air,

so if you suck on the spare air bottle and hold your breath you will pop your lungs, if you breath out all the way up you should be ok and it might have saved your life.

[Pietsweis]

on the service you have six liters of air in your lungs.
at ten meters you have twelve liters of air,
at twenty meters you have twenty four liters of air,

so if you suck on the spare air bottle and hold your breath you will pop your lungs, if you breath out all the way up you should be ok and it might have saved your life.

Not to get technical but at 20m you have 18lt of air in your lungs.
At 30m it will be 24

[Lxv]

https://snorkl.ca/products/snorkl?fb...rwZxyZrJr9NIdk


Some-one is going to kill himself.


C

Anyone want to join my crowdfunding drive?
I want to supply every perlemoen poacher with one of these things for free.
Hell, I'll even do the deliveries!

[Olyfboer]

on the service you have six liters of air in your lungs.
at ten meters you have twelve liters of air,
at twenty meters you have twenty four liters of air,

so if you suck on the spare air bottle and hold your breath you will pop your lungs, if you breath out all the way up you should be ok and it might have saved your life.

Correct. But you have to be trained to breathe out all the way up. It's counter instinctive and unnatural. It has to be done with a conscious effort against natural urges to close the mouth and hold the breath in. A slight hesitation can be fatal.

Submarine crews do a free ascent, hooded ascent and survival suited ascent to requalify annually from 30 metres using this technique. Trainee submariners start the training of breathing out just below the surface progressing deeper and are evaluated at all times. The suited ascent is very fast due to the buoyancy of the suit and the air expanding inside it. Any hesitation to breathing out during the ascent will prove deadly.

[Jeeper]

I don't know if somebody mentioned it in previous posts above (I did not read all the posts), but this looks like the ideal tyre pressure pump to me.

[Wetkit]

Guys, what nobody tells you is that with the pressure in this bottle, you cannot go lower than say 6 meters anyway.
I think this puts you in the no danger zone.

You also get a mobile unit. I think it is called dive buddy or something.
Basically a small battery compressor floating in a ring with a long air pipe.
Same thing, with the pump pressure you cannot really go below 6 meters.
It is great for viewing fish or cleaning your boat.

[LandyAndy]

It’s a long time since I did my diving course, but surely if you take a good deep breath at 6m and hold it until you surface you’re going to be in a world of trouble?

[Olyfboer]

Guys, what nobody tells you is that with the pressure in this bottle, you cannot go lower than say 6 meters anyway.
I think this puts you in the no danger zone.

You also get a mobile unit. I think it is called dive buddy or something.
Basically a small battery compressor floating in a ring with a long air pipe.
Same thing, with the pump pressure you cannot really go below 6 meters.
It is great for viewing fish or cleaning your boat.

Even at 2 -3 meters taking a breath and surfacing without using the correct technique will result in critical life threatening injuries if not fatal. Suggest you read the other comments from qualified persons.

[AndyT]

Guys, what nobody tells you is that with the pressure in this bottle, you cannot go lower than say 6 meters anyway.
I think this puts you in the no danger zone.

You also get a mobile unit. I think it is called dive buddy or something.
Basically a small battery compressor floating in a ring with a long air pipe.
Same thing, with the pump pressure you cannot really go below 6 meters.
It is great for viewing fish or cleaning your boat.

Why is the pressure in the bottle an issue ?

[cainslie]

Why is the pressure in the bottle an issue ?

It's clearly advertised as 3000psi which means it certainly will work below 6m.