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Bill & George + intersted parties
IANTD
1. On po2's: Limits are like the red line on a tach they represent do not exceed
Recreational LIMIT is 1.6 ATA. with work po2 at 1.4 to 1.5 max
2. On tech diving max po2 is 1.5 ATA work or operational po2 is 1.4 ATA or less
In both rec and tech diving our material state foe each variable decrease
the po2 by0.05 ATA
The variables include cold, work, extended deco etc. For deco we state
decrease by0.25 ATA for each variable.
3. Yes in tech EANx we do teach a max depth to 170 feet The depth range is 140
to 170
but the po 2 may not exceed 1.4 ATA.the dives use higher EANx mixes for deco
with a recommended max of EAN 80 staring at 30 feet or not to exceed a po 2
of 1.55 ATA for deco. we do not prohibit oxygen but as it has a po 2 of 1.61
ata at 20 fsw we encourage it be replaced with a mix that will not exceed
1.55 ata.
4. In all dives the CNS percent clock (100%) is not to be exceded and IANTD has
tables for computing the CNS % dose and also the cns% surface interval
5. We encourage divers to use trimix on dives deeper than 160 FSW but we are
reralistic in that we teach to a depthof 190 feet on air (po2m of 1.42ATA)
6. We recommend a end on mix of 132 feet but we allow deeper ends on great
depths ususally
a maximum of 165 fsw. a typical mix ranges from for instance at a depth of
250 feet, heliair 14 33 to trimix 16 50.
7. We are the first organization to specify minimum bottom times in courses to
increase diver proficiency
in fact other agencies and some individuals refer to outr training as UDT
style as it is developed around the process of accident analysis and it
includes as you know substantial strss management drills simulating real
life emergencies. We go to great trouble to constantly update our programs with
the maximum diver safety we can produce. The courses are developed by many of
the leading tech divers iaround the world. It is not perfect but we continue
to search for perfection which is the best anyone can do
8. On tank markings we are still the same as we have been except at Georges
suggestion we are going to come out with additional colored backgrounds and
ink so multi mix dives can be more easily identified.
9. In cave diving we are demanding on equipment and defintitely on line arrows.
On acidents I do not think any of the agencies are negilent the problem is that
divers do not follow the safety issues covered once they leave a course whether
it be IANTD, NACD, or NSS cds or CDAA. All of us do the best we can. In an IANTD
course we demand a minimum of 450 minutes of bottom time in a full cave course.
Most of us teach with 500 minutes + I ususally exceed 600 minutes in my classes.
All the cave associations do a good job.
10. Again IANTD rec courses include:
open water-advanced open water-nitrox diver-deep air to 130 feet-advanced EANx-
overhead environment-introductory cave-rebreather-dive master
11. Tech courses include
advanced deep air to 160 feet- tech EANx- tech deep air to 190 feeet- trimix -
Wreck-cave ad cave-
rebreather-and blender + of course instructor qualifications
12. Yes we know the effects of nitrogen on the body and we also know the effects
of helium on the body. Helium as nitrogen has numerous side effects but is a
risk benefit choice for deeper dives.
13. IANTD teaches risk awareness at all levels of training. and we emphasize
both physcial and mental conditioning.
on dives all dives we recommend filling out the following table
RISK CORRECTIVE ACTION BENEFIT VALUE ( on value a series of yes and no
answers will
ass
ist the individual in deciding if a specific form
of diving is worth the risk to them)
14. IANTD is open to worthwhile input on how to increase diver safety. We are
not going to play debate games as we spend our time trying to search out and
refine better training methods and updating our instructors and the diving
public.
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