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!)  :-)

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!  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?  :-)

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!)  :-)

Strike