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At 08:40 AM 8/17/99 -0400, Ted Green wrote: > While I am not a proponent of this practise, divers who put a 30 >or 40 cuft. pony on the back of their doubles, do so to have a >completely independent source of gas. The reason for this they >claim is that if you strike the isolator and break the manifold >causing a rapid gas loss, there probably will not be a knob left to >close the isolator down with. This practice is a hold over from >single outlet doubles. [SNIP] It's interesting that anyone would carry a pony for this reason. The way I see it, if your diving skills are so rusty that you're likely to break your manifold by crashing into something, you should consider spending some time in a pool practicing, or give up diving. One of the justifications I've heard recently on why people use ponies is that they don't want to spend the money on isolator-equipped manifolded doubles and opt to use their singles with a pony as a backup. Another reason I've heard recently is that doubles are too heavy and unwieldy on the surface; a single+pony is easier to transport between the car and the boat since you can take them apart. Why someone would choose to reduce their pre-dive workload or to be frugal with their life-support equipment is beyond me, though. Whatever... to each his own, I guess. -Mike Rodriguez <mikey@ma*.co*> -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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