Technical Question...help please
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DaveO
Contributor
Does this condition exist as both a layer (horizontal gradient) and a "wall" (the vertical gradient)?
The Pirate
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By vertical gradient, I think its referring to the difference in salinity from top layer to bottom layer.
DaveO
Contributor
Got it... thanks.
gaschef
Guest
DEar All
Following on from what has already been said the difference between depths of salt and fresh water is insignificant.
the specific gravity of salt water is 1030 kgs / cubic metre
the specific gravity of fresh water is 1000 kgs / cubic metre
the difference is not worth worrying about, besides which a normall 63mm depth gauge is at best plus or minus 5% accurate
thats its build specification
just make sure you add on an appropriate jesus factor and you should be alright
Following on from what has already been said the difference between depths of salt and fresh water is insignificant.
the specific gravity of salt water is 1030 kgs / cubic metre
the specific gravity of fresh water is 1000 kgs / cubic metre
the difference is not worth worrying about, besides which a normall 63mm depth gauge is at best plus or minus 5% accurate
thats its build specification
just make sure you add on an appropriate jesus factor and you should be alright
Ontario Diver
Guest
It doesn't really matter to the diver because we use out depth to figure out our NDLs (or deco sched 
)- but nitrogen uptake is based on pressure not depth.
So your bottom profile for purposes of determining your nitrogen load at 99 ffw and 96swf (both reading on your depth guage as 96 f) - you are under the same pressure and the rate of N2 absorbtion will be the same.
)- but nitrogen uptake is based on pressure not depth. So your bottom profile for purposes of determining your nitrogen load at 99 ffw and 96swf (both reading on your depth guage as 96 f) - you are under the same pressure and the rate of N2 absorbtion will be the same.
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