DIY Bungied Second - please post a pic

[rhwestfall]

quick search - and I don't have the time to search further...

anyone got a picture of how they are making their bungie necklaces? I recall something of a simple length of bungie, knotted at the ends, and zip tied at the mouthpiece (or something like that). Knew there were a couple concerns of getting it right so I want to see the picture again. Please post if you can.

Thanks

[halocline]

Here's one of mine. The bungie is just connected together with two small zip ties (one black, one white in this case for no reason) leaving a couple inches of overlap, which forms a small loop that I slip over the mouthpiece. alternate.jpg

[ScubaSam]

I was taught to do my bungie backup (picture below) by my instructor. Use one zip tie, the same one that keeps the mouthpiece attacked to the regulator also holds the bungie necklace. The bungie is knotted on both ends to keep it from slipping past the zip tie.


Bungy necklace.jpg

[ScubaSteve]

Same as mine....shocker .

I was taught to do my bungie backup (picture below) by my instructor. The zip tie that keeps the mouthpiece attacked to the regulator also holds the bungie necklace. The bungie is knotted on both ends to keep it from slipping past the zip tie.


Bungy necklace.jpg

[Angry Turtle]

Here's one of mine. The bungie is just connected together with two small zip ties (one black, one white in this case for no reason) leaving a couple inches of overlap, which forms a small loop that I slip over the mouthpiece. alternate.jpg

I build mine just like this, but I use a piece of heat shrink over the zip ties. I use black bungee and black heat shrink so it looks nicely "finished".

[DevonDiver]

I was taught to do my bungie backup (picture below) by my instructor. Use one zip tie, the same one that keeps the mouthpiece attacked to the regulator also holds the bungie necklace. The bungie is knotted on both ends to keep it from slipping past the zip tie.

Mine are detachable (loop in the necklace, not perm-fixed under a tie-wrap on the mouthpiece). Give's a few more options, especially when the excrement hits the oscillator..

[eelpout]

This is a link to the double fisherman's know that we use on bungee cords for our short hose back up regs. Once tied you the 2nd stage mouthpiece is slipped between the two knots (picture15), slide it all the way down over the mouthpiece and pull the cord to tighten the knots around the metal/platic part of the 2nd stage that the mouthpiece is clamped to. Double Fisherman's Knot | How to tie a Double Fisherman's Bend (Grapevine Knot) | Climbing Knots

Jim

[eelnoraa]

...Mine are detachable (loop in the necklace, not perm-fixed under a tie-wrap on the mouthpiece). Give's a few more options, especially when the excrement hits the oscillator..

Can you be more specific?

I did mine the same way as Sam and Steve. I found it far more secure than the fishermans knob method

[Jax]

This is a link to the double fisherman's know that we use on bungee cords for our short hose back up regs. Once tied you the 2nd stage mouthpiece is slipped between the two knots (picture15), slide it all the way down over the mouthpiece and pull the cord to tighten the knots around the metal/platic part of the 2nd stage that the mouthpiece is clamped to. Double Fisherman's Knot | How to tie a Double Fisherman's Bend (Grapevine Knot) | Climbing Knots

Jim

Same here - It's tight enough to keep the reg, but if I'm breathing on it (independent doubles, y'know), a needful diver can yank it out and breath.

I'll post pictures tonight.

[DevonDiver]

Can you be more specific?

I did mine the same way as Sam and Steve. I found it far more secure than the fishermans knob method

I know of a double-fatality in which a perma-bungeed necklace directly contributed towards the incident chain in a technical penetration dive. The nature of this was confirmed by those involved in the body recovery of the two divers concerned. It hasn't been confirmed in a formal incident report yet, because no such report has been forthcoming from the local authorities. If/when it is, I suspect the report will draw heavily on the expert advice of the divers concerned with the recovery and those who dive the site concerned regularly. I've dived that site frequently (350+ dives there) - and was filming in and around the location of the incident last week.

Now... I'm not saying the perma-bungeed necklace "killed" anyone... just that it was a significant factor in a chain of events. As a factor in that chain - a different configuration approach would have possibly led to a more favourable outcome. The incident concerned involved technical penetration into a confined environment and the bungee was the cause on an entanglement issue.

I don't want to side-track this thread into an A&I debate... and I hope you can understand my refusal to quote specific details. That refusal doesn't stem from lack of knowledge, but rather an ethical obligation towards the friends/family and co-workers of the deceased, coupled with legal considerations associated with the still pending accident report. I'm sorry if that quashes anyone's idle speculation into a fatal incident.

To generalise this issue - most experienced/technical divers understand the relationship between 'break-away' attachments and the risk of entanglement. If such a diver chose to apply this principle to any area of their configuration, then I'd suggest that equipment stowed around/attached to the neck is a primary candidate for such an approach.

I don't have a pic of my configuration - because my kit is stored 3 hours travel away at this time. However, it is of a very similar configuration to that posted by Halocline... using 2 sliding knots to create an over-lap loop for the mouthpiece. Once adjusted for size, those sliding knots are fixed with zip-ties. It is just as secure as a perma-necklace, but allows the regulator to be freed with direct manipulation, without the need for cutting anything. I use the same approach on my single, double and sidemount reg configurations. I also build one of these for every student I teach, recreational and technical.