Quote: (Originally Posted by
Drmike)
Using ccr on shallow non overhead dives increases the risk of death on that dive compared to using OC.
I agree. The need for CCR should be evaluated for each dive.
10-15 meter dives in a quarry do not warrant the use for a CCR. Having said that, I must say that I usually do make these dives with a CCR. Mostly because my quarry dives are to test new configurations or something like that and I wouldn`t like to find not being able (fast enough) to get to something on a 80m dive.
Even though I prefer to use CCR while wreck diving, there are times when it is a bad choice. When trying to retrieve the enige of a torpedo from inside a sub at 35m, I used double 15`s with nitrox instead of CCR. In a case such as this, you know you won`t monitor the CCR as close as you should and hence, leave it behind and go OC. At least then you have the reassurance that as long as you have something to breath, you`re doing allright. The CCR could break down giving you some deadly mix and you won`t know it. Hence, use OC and not CCR.
Robert