Who can explain Partial pressure to a Marine

[Tegg]

No No Kevin, I don't want to ignore your comments. You are missing the point.

This is a free country, you have to right to say whatever you want (I would fight for it and all the Marines out there in the world are doing it right now!) BUT we also have the right to call you on it. Freedom of speech does not come with immunity. If we just ignore you, you wont know that what you said crossed the line. AND It is totally demeaning to you in the end - Should I just blow everything you say off because you said something offensive? That's awful, you are person and I respect you, you just happen to say something awfully distasteful to civil society.

Look CDF is our group, WE are a community of lots of different kinds of folks. This is not your private livingroom.

I am sorry Kevin, I am calling you on the towel heads thing... not acceptable in our forum.
Do you think you would have gotten away with saying Nigger or Spik ? Not here.

No long term harm done, forgive and forget. Lets move on knowing that there are boundaries.

Just wondering. If a person wears a towel on their head, is it not acceptable to call them a towel head?

[Daphne]

only if they are wet and out of the shower!

[Ken Hill]

0321 Semper Fi:

There was an old running cadence that said ... I might me crazy but I'm no fool. You won't catch me in SCUBA school!

I've been there and done this before so try something!

A horizontal line on a chalk (now white board) representing the surface or 1 ATA along that line is a 21% column A 78% column and a 1% column for the other inerts. Explain to them that the 1 ATA reresents the weight of the atmos over their head here and now. When they get to 2 ATA (33ft) there is the weight of 2 atmos over their head and upon their body. 1 ATA being sky, 1ATA being water. This extra weight compresses the gas in air or any other mixture. Also explains why the tank only lasts half as long at 33ft, 1/3 as long at 66" etc as it does on the surface

1 ata _____________21___________78 _____________1_______


Then at the left a vertical line going down Write a 2 ATA at 33ft, a 3 ATA at 66 ft 4ATA at 99 ft etc. This will show the relationship to pressure and depth and the partial pressures of the gases to the right of the 2 ata's 3 ata's etc. The smart ones will pick it up and then sort out those that don't That's called homework. You can tell those that don't get it that its like feeling the pressure when reporting to their fire team leader or telling the same story to the company Gunny. They'll instictively know that the higher up the chain they go the more pressure thry will feel telling the story. Same with depth. "SSDD." My son in law had your MOS. Hope the graphs come thru if not PM me.

1ATA O ft_________.21_____________.78__________.1 -> partial pressure totals 1
]
2ATA 33 ]-------------.42----------------- 1.56------------.2 -> Partial pressures total 2
]
3ATA 66 ]------------ .63------------------2.34------------.3 -> ditto 3

et cetera