On 24 Aug 2001, at 19:51, David Strike wrote:

> Having - on and off - spent the last week with the Navy guys who, (having
> done their CCR training - seven months), are now into the tactical phase
> with LAR-V O2 units, it's interesting to note their depth limitations during
> training:  Just 8-metres, (or a PPO2 of 1.8!)  :-)

I am somewhat surprised to hear that the PPO2 has been cut back
on the military side of the fence. Wonder if they have finally lost
enough "hardware" to warrant the change.


>
> Now it's good to see it cut back from a PPO2 of 2.0 in my day, but it's also
> worth remembering that these guys haven't had one training incident since
> switching to the lower O2 pressure!

So it is a "hardware" issue. :-)



>Also bear in mind that they're often
> doing long exposures within a 24-hour period.  Which begs the question:
> Does fitness and hard exercise play a significant role in the liklihood of
> O2 toxicity?  And does being really fit reduce the onset of oxtox?  :-)

Two good questions. I think you are aware what the answer to that
would be from a particular segment of the diving world, that is doing
some cutting edge stuff these days. Could be......


>
> For what it's worth, next week we (they!!!) are practicing rope-work out of
> choppers and looking for - and disarming - mines. (I'll be checking up on
> the food and making sure that it's good enough for them to eat!)  :-)

I know they will appreciate the fact that someone is concered
enough to test the food first... :-)


>
> Strike


~~~~~~~~~~
Mike Wallace
Huntsville, Alabama