Units of Measure in Diving?

[Blackwood]

Weather reports tend to list barometric pressure in inches of mercury.

 

[DuboisP]

Weather reports tend to list barometric pressure in inches of mercury.

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

 

[SailNaked]

J'abandonne. Je ne comprends pas la question. quelle différence cela fait-il ce que vous appelez les unités de mesure si vous utilisez de la même manière. J'aime utiliser les métriques en raison de la conversion de la profondeur aux atmosphères est facile 10 = 1, mais ma jauge et l'ordinateur lire dans les pieds si je dois utiliser 33 = 1 même même. si elle est juste opinion sur aimer un ou l'autre alors je comme celui que j'ai appris quand j'avais 5 et je suppose que vous faites pour.

 

[SailNaked]

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.

 

[Krenath]

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.

Using both hands, you can count to 511. I just have some trouble holding up selected finger combinations for certain numbers. Assuming the thumb is the 1 bit, I have a lot of trouble with 11 (11010) as I can't seem to get my ring finger to stand up on its own if my middle and pinky fingers are supposed to be down and my thumb is unavailable because it's up too.

And we'd have some 'issues' with numbers like 4, 6, and 22. 17 and 19 would be cool, though. Counting to 1 underwater would end your dive

That sort of thing is probably why 10-bit binary didn't make it as the default finger-counting method.

 

[Blackwood]

Using both hands, you can count to 511.

Are you missing a finger?

 

[Tigerman]

Actually for 10-bit binary the highest bit would be 512 which means you could count to 1023..
Unless you want to go for signed int instead that is..

 

[peterbj7]

I think you tried to over simplify the US system and choose poor illustrations.

Here is my list per your request:

1) The "+" is not used on AL tanks in the US.

2) The 3300 rated pressure you mentioned is for a 100cu ft AL tank (not 80 cu ft).

3) The same tank achieves is capacity at 3300PSI, not 3630PSI.

4) Only some steel tanks are allowed a + rating
- Those that do are as you stated (capacity is at 110%)
- Those the do not achieve their capacity at 100% pressure rating

5) The variations in rated pressure for AL tanks are much less than steel. Most are 3000 with a couple of 3200/3300 rating for some oddball sizes. Steel tank pressures vary tremendously from 1800 to 3500PSI.

All this may or may not be true, but is irrelevant to the substantive point, which is that what Americans measure in a tank is not what others measure.

 

[GrumpyOldGuy]

All this may or may not be true, but is irrelevant to the substantive point, which is that what Americans measure in a tank is not what others measure.

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.

 

[peterbj7]

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

Well no actually.....