Re: Dive hazard rating

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Posted by Walt on June 23, 2006 at 16:20:43:

In Reply to: Dive hazard rating posted by seahunt on June 23, 2006 at 15:21:48:

You are undertaking a difficult task on this one.

Perhaps a failure quotient? Example, you have an H valve and redundant first/second stages - excellent set-up. But, your SPG is defective, no one filled your tank after the last dive(someone removed the tank tag), and you don't realize it until you suck your last breath. At 30 feet, not a problem, make a controlled ascent. At 70 feet, a little more of an issue, but do-able. At what depth can you make that ascent and live to tell abou it? Would you assign risk points logarithemically based on depth (and probably specific to a diver's ability to do this). This is just one problem as teh point of failure was that defective SPG (you wouldn't know you had a short fill).

Now add a second problem - is it cumulative or exponential - I'd argue exponential as 2 problems are 4 areas of risk....3 are 9. Maybe n(n-1)?

Now factor in the site characteristics (current speed, depth, chill, overhead, blue water, night, etc.)

Good luck! (or just go diving)

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