A Case for Spare Air

[wetb4igetinthewater]

Would you rather run out of air deep or shallow?

If I'm diving solo at 30 feet (as the OP stated), I'm already shallow if I suddenly suffer catastrophic gas loss.

 

[happy-diver]

CESA done once never practiced, should never be done, should never be practiced

Oh my I'm out of air, but I've got a spare air, if I remember, hope everyone approves


Now "this" spare air for plonking around shallow or deep has more redundancy than your primary

Very good

 

[Compressor]

I’m really curious: has the crowd that advocates spare air EVER used it at depth? How was the experience?

 

[James79]

I’m really curious: has the crowd that advocates spare air EVER used it at depth? How was the experience?

Just to play devil's advocate... has the crowd that denounces it ever used it either?

 

[markmud]

These are really good questions:

I’m really curious: has the crowd that advocates spare air EVER used it at depth? How was the experience?

Just to play devil's advocate... has the crowd that denounces it ever used it either?

cheers,
m

 

[BRT]

If I'm diving solo at 30 feet (as the OP stated), I'm already shallow if I suddenly suffer catastrophic gas loss.

Probly not going to run out twice either.

 

[BRT]

I’m really curious: has the crowd that advocates spare air EVER used it at depth? How was the experience?

Someone already posted above about testing at many depths.

 

[wetb4igetinthewater]

Someone already posted above about testing at many depths.

There is research on how stress causes the body to release adrenaline which causes a n increased respiration rate which makes these tests invalid.

 

[BRT]

There is research on how stress causes the body to release adrenaline which causes a n increased respiration rate which makes these tests invalid.

So, no problem. See if you have more air without it.

 

[2airishuman]

Do you unscrew the valve and leave it open to inspection? I'm sort of timid about doing this with a "real" scuba tank. When I travel, my Dive Bag frequently gets that secondary TSA inspected note left in it. I assume (without any evidence) they saw the tank and were checking it.

The cylinder on the spare air is just as "real" as an AL19. The only differences are that it is smaller overall and has a smaller neck thread.

There have been isolated reports of the TSA confiscating cylinders that have tape over the opening, so don't do that.