To knot or not to knot

[Chris Hunger]

I hope this one might help you. I tried to show it slowly so anybody can follow.
It`s perfectly adjustable so you can change size from skindiving to diving with drysuit and gloves in matter of seconds.
Works like charm and i still dive the first set of bungees for over a year now (salt and freshwater).
Make sure you have some high quality material though. Same thing applies for your reg necklace.

As for an app I use Knots3D for learning. It`s an awesome app with tons of knots nicely categorized for all sorts of purposes. All animated! Never seen something better.
Though iam not sure they will have a version for Android users. Check it out and give it a try. I found it to be very useful!
Try learning a few basic knots... they can be a life saver As suggested earlier you can even train on tying knots while watching TV
Just do them over and over and they become ingrained.
Hope i could help out a bit.

Greetings Chris

 

[JohnnyC]

...is what it's called if it's pulled tight to form a bend. If you leave the loop open, it's called a Prussik loop

No, it's not. Its only a prusik loop if it's used as a prusik hitch. A double fisherman's knot, even before being pulled tight against itself, is still a double fisherman's knot.

Before you respond, understand what an IRATA Level 2 Rope Access Technician is. I literally live and breathe this stuff every day and while you may think it's semantics, it can be incredibly incredibly important.

 

[kelemvor]

I ended up doing a double overhand on the galileo computer bungee straps. Think I should remove it and use another knot?

Didn't do the prusik loop (or double fisherman's hitch?) because I didn't want a loop of bungee between the top of my wrist and the dive computer. I think prusik will make sense on my shearwater where there is a gap in the computer to accommodate the strap material.

The knot is a little larger than I'd like. Is that just a matter of a better tie job?

 

[Storker]

I ended up doing a double overhand on the galileo computer bungee straps. Think I should remove it and use another knot?

Nope. That's the knot I'd use as well.

 

[Storker]

understand what an IRATA Level 2 Rope Access Technician is.

I have absolutely no idea, since I don't know WTF IRATA is.

So I probably shouldn't have replied to your post.

 

[offfi]

Warning to All: All knots reduce the rated tensile strength of line, often between 50 and 75%!

Some very useful information that nobody ever told me before.
This is why I love SB in general and many of your postings in particular.

EDIT: According to a link posted by another user, the remaining strength is about 60-80%.

 

[Akimbo]

... EDIT: According to a link posted by another user, the remaining strength is about 60-80%.

There is a LOT of variation depending on the knot, material, braid, diameter, safety margin, and testing methodology... which led me to write "often between 50 and 75%". That is the rough average that I recall. The "safe working load" can vary from 3:1 to 10:1 depending on the application, manufacturer, and country. I see a lot of specifications that just list the average or minimum breaking strength and leaves the safety margin up to you. Lots to think about.

BTW, thanks for the kind words.

 

[Akimbo]

You mean basically splicing the strands of the fall into the standing part? Why not just do a proper splice, then?...

Not quite. A splice separates the strands of the bitter end and weaves them individually into the line over a length of several diameters. This method takes the twisted bitter-end and weaves it into 3-4 strands. Maybe a boatswain can help me out?

Edit: Eye Splice | How to tie the Eye Splice | Splicing Knots

... (On an unrelated note, I learned something just now: I didn't know that the fall is also called the bitter end. Now I know. Cool.)

Not sure if bitter-end is a Navy term or not. Come to think of it I don't know its etymology. Now look at what you've done. You know how dangerous it is to get me thinking!
Online Etymology Dictionary

 

[Wookie]

Not sure if bitter-end is a Navy term or not. Come to think of it I don't know its etymology. Now look at what you've done. You know how dangerous it is to get me thinking!
Online Etymology Dictionary

Sailor term, if not a Navy term. As the line was passed through the bitt prior to tying it off, when you came to the end of the line, specifically a anchor line, you are said to have come to the bitter end.

 

[BoltSnap]

I ended up doing a double overhand on the galileo computer bungee straps. Think I should remove it and use another knot?
View attachment 412118
Didn't do the prusik loop (or double fisherman's hitch?) because I didn't want a loop of bungee between the top of my wrist and the dive computer. I think prusik will make sense on my shearwater where there is a gap in the computer to accommodate the strap material.

The knot is a little larger than I'd like. Is that just a matter of a better tie job?

What are the pieces of material covering the end of the cord?