Is the failure that they started off by standing on the bottom?
Proud to be a boring health and softy crap following sissie!
I don't have enough palms or faces to react appropriately to that.
I saw an incident with one guy who was filling his DSMB from his exhaust valve at around 20M, lost his grip on his reel which got pulled up by the DSMB, caught on his DV and dragged it out. He was dragged to the surface with no DV in. When we got back to the boat, he was on O2.
Not surprsied BSAC don't support this method of deploying a DSMB.
Is using the octopus the suggested BSAC way? or is a small bottle or CO2 cartridge recommended? The last time I deployed a DSMB on a course (Advanced Nitrox). The second regulator on the twinset went into free flow. What do you expect in the middle of winter at Stoney?
Personally, I have a crack bottle and I've used this almost since they were first sold. Overseas, because airlines (or more accurately check-in operations) are a bit funny about compressed gas bottles of any sort (I had a crack bottle confiscated at Boston on a return flight even though I demonstrated that it was empty but had no problems taking it out via Heathrow on the same airline) I use the easyfill adaptor with my otherwise redundant drysuit inflation hose.
I have a dislike of any lines close to equipment where they can get caught up and would never try to fill a DSMB from the exhaust valves. It may look cool but I'd prefer to be safe.