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>Geir Johannessen writes:
>> 
>:
>> Computer divers would like to tidy up their stories too. But, it is a lot 
>> harder. When that little gadget recalls the latest dive, maximum depth 
>> will be displayed as well as dive time. Some will recall the profile 
>> also. Negative attributes are much harder to conceal. In effect, computer 
>> divers will have to admit the true colors of their dive, while table 
>> divers can go on lying about it. 

David Story replies

>I believe all of us should insist that computer manufacturers add true
>profiling capabilities to their computers.  Don't buy a computer which
>cannot log the actual profile and surface intervals of your last
>several dives, not just max depth and time.
>
>Max depth and time, even when reported accurately, is only an
>insignificant amount of information when you're talking about
>multi-level, prolonged diving.  Data about actual dive profiles and
>surface intervals are vital to the improvement of dive tables: we need
>both data in which persons were bent, and data in which they weren't.
>
>We, the technical diving community, have a special responsibility to
>provide real field data from which the scientific community can build
>decompression models.  That data is terribly lacking today.
>
>I believe each of us has a responsibility to use only profiling dive
>computers, and report our dive data so that it can be used by others.
>
this would be a fabulous souce of data for maximum likelihood (probablistic) 
modeling of DCI for production of decompression tables.  It would require 
accurate evaluation of the divers for symptoms of DCI after the dives and 
time of occurance of symptoms would be useful.  This would require some 
training of everyone who wished to contribute to such a database.  It would 
aslo require accurate reporting of the gas mixtures used.  Someone needs to 
maintain the database, someone needs to write a manual for post-dive 
evaluation, someone needs to do the modelling.  It would be a long-term 
project, but as David points out it would be a real contribution of this 
forum.  Who volunteers?  I would, but the dog ate my computer. 

regards,

David Doolette
ddoolett@me*.ad*.ed*.au*

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