Can I get a ruling on this?

[limeyx]

If we're talking true "DIR" I believe they're using a knot on either side of a tie-wrap now. The problem with this design (and with double grapevine knots) is that the mouthpiece can come out quite easily... something you don't want to happen.

I've managed to have two mouthpieces come off with the bungee underneath the zip tie method (one about 5 mins into a 150 foot dive. I tugged my long hose gently as I thought it was caught and ended up with just the mouthpiece and a mouth full of water)

And it's not just that I cant tie em -- the second was put on by someone else

 

[cerich]

I didn't need to dive a HUB to know it sucked but I'll amend my statement. "Bungees are just as good if not better and are a hell of a lot cheaper". I mean we're talking about a backup holder, not comparing LED lights or regulators.





In other words you're trying to say that you got sucked in by an over-priced gimmick and don't want to admit that you got sucked in by an over-priced gimmick.

Nope I mean I tried it and liked it, wasn't sure if I would until I did.

 

[cmalinowski]

I did talk with someone recently who had one and he is switching back to shock cord as this one tended to slip off. I didn't really get into the details as I am a "shock cord--zip tie" kinda guy myself. But I thought it might be relavent to this discussion.

slipping off may be a reasonable thing as the friction that's there when dry rubber on rubber exists gets lost some when it gets wet. But I'm no physics major either.

Chris

 

[Scuba_Steve]

I love arguing about stupid **** as much as the next guy, but I can make about a dozen or so of these for $10, which means I can give them away to students by the arm load, to promote 'our style' of diving a little easier.

 

[Warren_L]

Shock cord/bungees have always worked for me. It ain't rocket science, which is the beauty of it.....

 

[MXGratefulDiver]

What exactly are the good and the bad of this little idea? (available from TDL)

I'm currently using one ... a friend brought back a handful of them from DEMA.

Good ...

- It's convenient. Just slip it on the backup reg and you're good to go.
- It's soft and flexible, which means that I can slide it over my head easily without having to live with a bungeed backup that sits down in front of my drysuit inflator valve.

Bad ...

- $10 for a necklace?
- It tends to "breakaway" a bit TOO easily ... I've had to resort to putting it around the exhaust port instead of the mouthpiece, which isn't my idea of a good idea.
- The length isn't adjustable, which means it'll fit some people properly and not others.

I'll keep it on my reserve singles reg, but will continue using standard surgical tubing on my main singles reg and doubles reg.

... Bob (Grateful Diver)

 

[Kendall Raine]

Sole function is to hold backup in place so you can find it instantly under the most stressful circumstances. This device fails that function by allowing backup to pull out. Kinda like a square tire... Since we're not stuffing our long hoses here, the only reason to pull the second out is to reverse it for scootering. This can be done in seconds with the zip tie method.

 

[Jason B]

the only reason to pull the second out is to reverse it for scootering.

I don't scooter yet but I'm having a hard time imagining that this is actually DIR - reversing the back-up when scootering. Is this correct DIR procedures?

EDIT - Through a bit of research, I got my answer elsewhere. Thanks regardless.

 

[Kendall Raine]

It prevents prop wash/flow from depressing purge and causing free flow. Works great. Why do you think it's not DIR? Didn't hear it from a GUE instructor ?

I don't know if it's still DIR. I hate labels and I don't care. I learned this from Irvine.