Scuba Quiz

[Bowers]

If the car is filling with water then the air is compressing and not exhaling or starting with less air (ie yelling and not getting a chance to fully inhale before water covers face) would result in barotrauma. If you held your breath from the surface (example: windows were open and your face was in water on impact) then it would be like a free dive and your lungs would shrink on the way down and come back to normal on the way up.

 

[gamon]

If the car is filling with water then the air is compressing .

Only if the car has slipped below the surface.

 

[johndiver999]

What would happen if there was a pony bottle in the car and two scubaboard members? Anyone know?

 

[ATJ]

further, I strongly doubt (with absolutely no data to back it up) that any car is perfectly sealed.

The VW bugs/beetles from the 1950s were pretty damned close to being sealed. It popped your ears if someone slammed the doors while you were in it. I have a feeling those cars floated, too.

Added link:
7 Facts About the Volkswagen Beetle — Auto Trends Magazine

 

[Bowers]

Only if the car has slipped below the surface.

Only if the car has slipped below the surface.

you are correct. But since the description was that the car settled at 50’, i figured that was a safe assumption.

 

[broncobowsher]

What would happen if there was a pony bottle in the car and two scubaboard members? Anyone know?

Depends on if there is a Shearwater in the car as well.

 

[-JD-]

What would happen if there was a pony bottle in the car and two scubaboard members? Anyone know?

That is easy, they both drown while arguing, starting over said pony:

- Is it sufficiently large to reach the surface?
- Should they be doing a safety stop?
- If they are doing a safety stop don't the need to recalculate the required size of the pony?
- How should they mount the pony?
- Do they have the correct training to be able to successfully execute the exit from the wreck?
- If not, isn't this a violation of agency standards of not going into overhead environments?

 

[-JD-]

@broncobowsher beat me to it

ETA: now gradient factor selection ...

 

[johndiver999]

That is easy, they both drown while arguing, starting over said pony:

- Is it sufficiently large to reach the surface?
- Should they be doing a safety stop?
- If they are doing a safety stop don't the need to recalculate the required size of the pony?
- How should they mount the pony?
- Do they have the correct training to be able to successfully execute the exit from the wreck?
- If not, isn't this a violation of agency standards of not going into overhead environments?

CORRECT!! No lung expansion issues because neither would exit the vehicle; they would expend their dying last breaths, arguing over the pony. I guess I should have asked a harder question.

 

[Esprise Me]

OK but what if they had a Spare Air? The Nitrox version? ::runs and hides::