You know what time it is so you could hyper oxygenate for a few minutes and be fine. 30 seconds isn’t that long and I don’t think it’s long enough to trigger the bends.
I’d do it at any survivable depths, especially since it said you’d have safety equipment, even though I’m not sure you’d need that either in 30 seconds.
I think bends only applies if you inhale compressed air at low depths and come up, because the 1L of air at -200m expands as you go up. Air you breath at sea level would compress down to nothing, which might mean that your chest cavity gets crushed, even at levels that are normally okay for divers. Rapid changes in either direction are what kills you.
You know what time it is so you could hyper oxygenate for a few minutes and be fine. 30 seconds isn’t that long and I don’t think it’s long enough to trigger the bends.
I’d do it at any survivable depths, especially since it said you’d have safety equipment, even though I’m not sure you’d need that either in 30 seconds.
I think bends only applies if you inhale compressed air at low depths and come up, because the 1L of air at -200m expands as you go up. Air you breath at sea level would compress down to nothing, which might mean that your chest cavity gets crushed, even at levels that are normally okay for divers. Rapid changes in either direction are what kills you.