Only you would be stupid enough to attempt to argue with GI quoting an old
TDI manual.
The Navy *used* to allow dives to PP02 of 2.0

Here is what the US Navy has to say:

US Navy Dive manual, revision 4

CHAPTER 10 - Nitrogen-Oxygen Diving Operations

10-3 OXYGEN TOXICITY

"The NITROX Equivalent Air Depth (EAD) Decompression Selection Table
(Table 10-1) was developed considering both CNS and pulmonary oxygen
toxicity. Normal working dives that exceed a ppO 2 of 1.4 ata are not
permitted,
principally to avoid the risk of CNS oxygen toxicity. Dives with a ppO 2
less than
1.4 ata, however, can be conducted using the full range of bottom times
allowed
by the air tables without concern for CNS or pulmonary oxygen toxicity."


10-4.5 Dives Exceeding the Normal Working Limit.
"The EAD Table has been developed to restrict dives with a ppO 2 greater
than 1.4 ata and limits dive duration based on CNS oxygen toxicity. Dives
exceeding the normal working limits of Table 10-1 require the Commanding
Officer's authorization and are restricted to surface-supplied diving
equipment only."

CHAPTER 17 - Closed-Circuit Mixed-Gas UBA Diving 17-7
- Setpoint Calibration. The normal operational ppO 2 setpoint for the MK 16
UBA is 0.75 ata. Appropriate calibration procedures are used to preset the
specific
ppO 2 setting.

S2, Mr. Black.

Scott

----- Original Message -----
From: "Michael J. Black" <mjblackmd@ya*.co*>
To: "Aquanaut Mail" <techdiver@aquanaut.com>
Sent: Wednesday, May 31, 2000 8:48 AM
Subject: Re: DIR Jackpot!


> On 5/27/00, George Irvine (Trey) wrote:
>
> > I am a psychopath, not a sociopath, and my track record speaks to the
> > rest.  Black is a pussy who did not like being corrected fro extreme
> > ignornat stupidity.
>
> No George, even I don't think you are psychotic, but that could change.
> As for my "extreme ignornat stupidity" were you referring to the pony
> bottle with pO2 1.9 debate?  Thought so, and just FYI here is what TDI
> says in one of their coursebooks (authored I believe by Jan Neal, who
> IS a BEST diver, i.e. absent from this list):


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