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>>[Ali Lawrie comments on turning off back mounted cylinders] >Richard Wackerbarth writes: >With either manifold or independent cylinders, the ability to shut off a >free flowing reg is essential. The turbulence caused by a free flow >can totally wipe out many OH situations. If you do not have the dexterity to >manipulate your valves in a back mount, then you need to learn to quickly >remove the harness so that you can gain access. I have to release my waist >strap and shift the mount over my head to do it. That is something that I >practice so as to be prepared should the need arise. When wearing back mounted cylinders, I also have to undo straps. What puts me off a manifold is not that I can't reach, but that a clock starts running when it starts to All Go Horribly Wrong. You have to turn off the offending valve reasonably quickly, or loose so much gas that you're unable to make it to safety. I know we're not talking about instantly loosing all your air here, but even so, it is a worry, at least for me. With independents, if the worst comes to the worst you can just ignore it. It's likely to trash the vis, but then vis is an unfamiliar concept to me anyway :-) Is the extra task loading of switching regulators that big a deal? I've never thought so... Be careful, Neal Dr. Neal Harman Department of Computer Science University College of Swansea Singleton Park Swansea SA2 8PP TEL: +44 792 295394 FAX: +44 792 295708
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