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>> T - Training, Proper training is required to dive caves.
>> G - Guidelines, Maintain a continous guideline to a verticle ascent.
>> A - Air, The Rule of Thirds (Third in, Third Out, Third Reserve)
>> D - Depth, Don't cave dive an EAD deeper than 130 feet (narcosis)
>> L - Lights, Carry a minimum of three working lights.
>
>All very excellent advice learned by many people, some who survived 
>close-calls, others who did not.  If you made the "D" standard 100 feet, 
>would fewer people die?  If you made it 150 feet, would more people die? 


I do not know.  From what I found in related documentation about accident
analysis rules,  the actual accidents described were deeper than 180 feet
(most of the time between 250 and more than 300 feet - on air).   The 130
feet rule seems to be established just to be compliant with the recreational
diving depth limit.
Michel Therrien
m.therrien@ne*.qc*.ca*

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