Units of Measure in Diving?

[Thalassamania]

so in binary you can count to 32 on each hand and can add and subtract using your fingers. no idea why this never caught on.

We do it all the time. On one hand you can count to 31 ... 11111 = 16+8+4+2+1. On two hands you can count to 1023 ... 1111111111 = 512+256+128+64+32+16+8+4+2+1.

 

[Tigerman]

I am pretty sure we are both measuring volume of gas in the tanks.

You are correct in that Americans do it differently than most of the world and this can lead to confusion when mixing systems. Which leads me back to my original post way back...

The best measurement system......is the one your buddy is using.

We dont..
In the US you measure the ammount of compressed air in the tank (in cu ft).
Most of the rest of the world measure tank sizes by actual volume (in liters), as in how many liters of water can you pour into it.
By doing that youll also now that if the tank is 12 liters and its compressed to 100 bar, you have 1200 liters of air to breathe. If its 15 liters and at 200 bar, 3000 liters..

 

[Akimbo]

Tigerman:

A little off topic, but are there any 300 Bar/4,351 PSI working pressure Scuba cylinders available in Norway?

 

[Akimbo]

We do it all the time. On one hand you can count to 31 ... 11111 = 16+8+4+2+1. On two hands you can count to 1023 ... 1111111111 = 512+256+128+64+32+16+8+4+2+1.

I find this works best on air at 50M/164' or more. That way I am never bored by the same answer.

 

[peterbj7]

In the US you measure the ammount of compressed air in the tank (in cu ft)

Actually you don't. You measure the amount of UNcompressed air in the tank.

 

[Kern]

Actually you don't. You measure the amount of UNcompressed air in the tank.

No, he's measuring the amount of incompressible water that will fit in the tank, & so knows how much gas it will hold at any given pressure. :mooner:

 

[Thalassamania]

I find this works best on air at 50M/164' or more. That way I am never bored by the same answer.

Binary Four, Binary Four!

 

[Tigerman]

Tigerman:

A little off topic, but are there any 300 Bar/4,351 PSI working pressure Scuba cylinders available in Norway?

Yes, but for some reason not many use them..

 

[super7]

thanks
we quit "mm of mercury" a long time ago, to use millibar

except on my barometer, but it's easier
going right : ok
going left : not ok

Japan Meteorological Agency have gone far as to use hPa (hecto-pascal) instead of millibars for weather forecasts.
I personally think that change wasn't necessary.

 

[peterbj7]

No, he's measuring the amount of incompressible water that will fit in the tank, & so knows how much gas it will hold at any given pressure. :mooner:

No, that's OUTSIDE the USA.