85 ft Dive on 13 ft Pony Almost Ends Badly

[uncfnp]

Cuzza, I'm sorry I must have misunderstood what that post meant. The section you quoted under your reply I must have interpreted wrong.

I interpreted what you quoted as, "people are spewing nonsense that you need large pony bottles for deeper dives." I'm interpreting this as, "a 13 ft.³ bottle should be fine for deeper dive because it's nonsense that people say you need a large one for deep dives."

CuzzA is actually referring to a tendency of some on SB to think that the only appropriate pony bottle is a 30 or better yet 40 cf bottle. And that is nonsense.

 

[Beau640]

Agreed. Sorry for the misunderstanding. Good discussion out of all of it though!

 

[gcarter]

CuzzA is actually referring to a tendency of some on SB to think that the only appropriate pony bottle is a 30 or better yet 40 cf bottle. And that is nonsense.

I just bought a 40. Is that because I secretly already knew I hyperventilate?

 

[oldschoolto]

All I know is that Jim (DD) just proved I only need to use a 13cuft tank for wreck diving... No BC or anything...

Jim.....

 

[northernone]

And for the record my smallest pony is a 63. Normally I ride with an AL80 slung.

If we'd like to keep rehashing this let's get yet another thread going elsewhere.


To each his own!
Cameron

 

[HalcyonDaze]

It's certainly an interesting practical test - the OP went in with an underfilled (2500 psi) 13 cf tank, dove to 85 ft, picked up a weight belt, and ascended with the added weight and without a BC. By the looks of things he took a minute to get to the bottom and a minute to recover the belt, left the bottom with somewhere around 1300-1400 psi in the tank, and was back on the surface 2 minutes later without taking a safety stop and with a little under 1000 psi in the tank.

 

[CuzzA]

I just bought a 40. Is that because I secretly already knew I hyperventilate?

For you, with a possible 1.6 cu ft stressed double sac rate? Might want to consider strapping a steel 120 cu ft. pony to your primary AL80!

 

[dumpsterDiver]

It's certainly an interesting practical test - the OP went in with an underfilled (2500 psi) 13 cf tank, dove to 85 ft, picked up a weight belt, and ascended with the added weight and without a BC. By the looks of things he took a minute to get to the bottom and a minute to recover the belt, left the bottom with somewhere around 1300-1400 psi in the tank, and was back on the surface 2 minutes later without taking a safety stop and with a little under 1000 psi in the tank.

With respect to the weight.. I freedive with enough lead to become neutral around 30 feet deep - deeper than that I am sinking. However, when I go down with a nearly neutral pony bottle, I remain positive because I do not get the chest compression effect. It makes a big difference, So putting on the second belt with an extra 6 lbs made me heavy, but not that heavy.

This is another video I made some time ago in 60 feet. This one was shot from a camera attached to a speargun, which was wrapped around a pole by a cuda. The fish wrapped up (behind the MG111) while freediving and the current was running strong, so I did the recovery with a tank. I was swimming hard and breathing pretty fast because I was working hard.

What is that rule anyway? Be back on the boat with 500 psi?

 

[gcarter]

For you, with a possible 1.6 cu ft stressed double sac rate? Might want to consider strapping a steel 120 cu ft. pony to your primary AL80!

Steel 117 primary

 

[Chip Elliott]

Thank God you are ok. I was wondering if that was a dive flag I saw. Just wow. Too close for comfort.