Quote: (Originally Posted by
Drmike)

Using ccr on shallow non overhead dives increases the risk of death on that dive compared to using OC.
Hmmmm - this may or may not be the case, I suspect it depends on too many factors to be universally the case, its up to the individual of course to make that call.
However it may also be the case that using a CCR on shallow dives (that don't really
need a CCR) may reduce the risk on future deeper dives where CCR is more beneficial by keeping a diver familiar and in-practise. To some extent it all depends where you draw your line on the balance sheet of risk/benefit.
If you do enough diving to stay current on both systems, and do enough deeper/penetration/etc dives to feel no benefit from using CCR on shallower/easier dives to keep "current", then you are a lucky man
Its also perfectly acceptable to my mind to say that the risk may be higher but an individual accepts this because they find CCR a more enjoyable experience, as long as they
do assess the risks and benefits
to them.
Neil