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Another Shearwater Great Service Thread

Discussion in 'Shearwater Research' started by JohnRom, Jan 10, 2019.

  1. Divectionist

    Divectionist Solo Diver

    # of Dives: I just don't log dives
    Location: Gold Coast, Australia
    349
    195
    43
    This what I do. See how the ends are tucked away? 2 pieces of tubing and 2 tightly pulled double knots after adjusting for 2 strap sizes to accommodate the thicker part of the forearm on one side. Nothing ever moved or slipped there and I pull pretty hard when getting it on or off.
     

    Attached Files:

  2. admikar

    admikar ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 100 - 199
    Location: Bosnia and Herzegovina
    690
    292
    63
    I tied it differently. One end is knoted just like on your picture. Other end is just put through,long, with knot on the end and it slides freely. That way I can accommodate different thickness of wetsuit, drysuit or bare arm. Excess bungee is then just tucked under itself. Not my idea, someone posted it on SB.
     
  3. Boncel

    Boncel Angel Fish

    # of Dives: 25 - 49
    Location: Switzerland
    25
    2
    3
    @Divectionist, I think i have the same knots you have. I might just have to really crank on them to make sure the knots themselves are tight. Perhaps that is the problem.
     
  4. Divectionist

    Divectionist Solo Diver

    # of Dives: I just don't log dives
    Location: Gold Coast, Australia
    349
    195
    43
    Yeah I find cranking is the key with surgical tubing, gotta really pull the hell out of it and the knot gets really tight and will not move due to friction and pinching itself. If it's too lose, however, it can quickly pull out. I've fiddled quite a bit with these knots before getting it right and having the loops point the right way (outward instead of curling inward) and in the process have found that I could easily undo the tight knots but essentially had to resort to cutting the very tight knots because there was no way I could fiddle it apart.
     
  5. wetb4igetinthewater

    wetb4igetinthewater Instructor, Scuba

    # of Dives: 500 - 999
    Location: Seattle
    3,714
    1,978
    113
    Have you tried melting the knot a bit with a lighter?
     
  6. Boncel

    Boncel Angel Fish

    # of Dives: 25 - 49
    Location: Switzerland
    25
    2
    3
    I cranked the crap out of the knot. I will be in Oman soon and will let you know. If the knot keeps slipping i will try melting it a little. I am assuming it is like melting paracord?
     
  7. wetb4igetinthewater

    wetb4igetinthewater Instructor, Scuba

    # of Dives: 500 - 999
    Location: Seattle
    3,714
    1,978
    113
    Yes. It doesn’t take much. I like having two separate bungees so if one fails I have another. Hasn’t happened yet, but you never know...
     
    shoredivr likes this.
  8. Divectionist

    Divectionist Solo Diver

    # of Dives: I just don't log dives
    Location: Gold Coast, Australia
    349
    195
    43
    I lost stuff that was attached to bolt snaps with braided line before, ever since I double zip tie everything attached to bolt snaps. Can never fail safe enough as long as it does not become a cumbersome mess of knots and backup straps.

    For computers etc. where zip ties are not very useful, I prefer using surgical tubing over bungees because it feels much nicer and stretches better, but I heard that it does not live forever in salt water. How often do you swap it out? I am thinking every 50 ocean dives or so...
     
  9. shoredivr

    shoredivr Solo Diver

    # of Dives: 1,000 - 2,499
    Location: Ontario
    8,177
    7,632
    113
    I have two bungees plus a binge loop that goes around my forearm. Three things would have to fail to have it fall off.
     

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