JeffG
Contributor
I dunno if that's a completely valid criteria ... BCD's and SPG's were a non-issue for people who were used to diving without them ...
... Bob (Grateful Diver)
So in this scenario. Diving with no SPG and then SPG's are invented.
Looking at the problem, the SPG gives the diver constant feedback on his/her gas supply, whereas before I waited till the reg started breathing like crap and then flip the switch on my valve and get out of dodge.
The downside is that I have an extra gadget and hose.
In this case the benefit is worth the extra failure points.