Redundancy question

[DiverMole]

Most YBOD divers will practice these skills on most dives.Normally at the bottem someplace

I certainly practice bailout (which is easy for me as I have an OC/DSV), but I dont practive semiclosed normally

Semi closed on a YBOB is a stop gap solution , more usefull for travelling horizontally as the PO" drops so quickly when ascending. So its a great way of extending OC gas supplies while at stops etc. If you have an ADV fitted its a piece of cake, you just breath out through your nose every 3rd breath, the unit does the rest. With Bobs OC?DSV its even easier, you just turn the lever to 45 degrees and each breath is then a mix of loop gas and fresh gas from the reg. I have an auto dump fitted to my lungs so buoyancy etc remain constant automatically

Personally I always carry enough gas to bail out fully, so my safety plan is bail out, start to ascend and consider options, only go back on the loop if its safe to do so

Nice thing about RB's is you have so many more options than an OC diver to recover from problems. OC really is a last resort. Thus I consider my RB safer than OC, which is one of the main reasons I dive it