nœud coulissant

13:10 Dec 31, 2020 

The knot in your video is a "demi-clé" aka a "clove hitch". Sailing and diving are among my specialisations, from personal family and professional experience.
See my post with source below.
Note that the "hangman's knot" would never be used in your context of course! ;-)

12:04 Dec 29, 2020 

Thank you for taking the time to watch the video and sharing your detailed knowledge of knots. In view of the discrepency between text and video, I have flagged this to the client.

22:55 Dec 28, 2020 

what is shown in the video is a knot meant to hold tight, NOT to slide.

The video says nothing - just music. If this knot at 00:20 to 00:30 is meant to be "un nœud coulissant" (which would make sense if it's going to be used to move this bag filled with stones up and down) then it's NOT what is shown on this video.

This video is not going to impress anyone past beginner's level in ropework ...

BTW, there several knots that can "slide" - so without this video it would have been simply impossible to know which one is the one meant to be used (never mind the video showing the wrong knot).

One way or another, there is a discrepancy in this video.

If they wanted to put a knot that would hold the rope at the point marked with the black tape (i.e. no "sliding" of any kind intended) then what is shown in this video is the right knot, but it's given a wrong name.

If they really intended to put some kind of "sliding knot", what is shown in the video in 00:20 to 00:30 is for sure not that.

So, you will need some additional input from the client - so they make up their mind as to what is right - the knot shown on the video or the name given to it ... can't be both.

22:44 Dec 28, 2020 

All you need is in this video.

There is a "bowline knot" in this video, but it's at 00:43 to 00:53 - you can clearly recognise it although the way it's presented you won't learn how to do it from this video.

The knot he's making at 00:20 to 00:30 is in fact a "clove-hitch" knot - a self-locking knot! - the more you pull, the better it holds. [ https://en.wikipedia.org/wiki/Clove_hitch ] If you make it over smooth metal, it just may slide but because of the friction of the rope on itself, the rope won't last very long.

There is a slightly different knot (looks almost like the "clove-hitch") that you put at the top of the rope on a carabiner and then you can control the movement of one strand by letting loose or holding the other strand - THAT would be the knot you would need to make in the part 00:20 to 00:30 and that one IS meant to slide and it's a The Munter hitch, (a.k.a the Italian hitch or the Crossing Hitch)

https://en.wikipedia.org/wiki/Munter_hitch

So the knot you need as presented in this video is DEFINITELY a "Munter / Italian / Crossing Hitch" - if you want it to slide and be used to control the sinking of the bag filled with stones.

20:16 Dec 28, 2020 

Slip-knot would seem an ideal choice for such purpose - simple to tie, quite secure, simple to untie later.

13:24 Dec 28, 2020 

That is certainly a useful guide. I think it is clear by comparing the end result in the video and their image of a 'nœud coulissant' that we are not talking about a typical 'hangman's knot'.

12:05 Dec 28, 2020 

Here's the difference according to this 'matelotage' site (pages 2, 3 and 6)
http://www.croisiere-catamaran.eu/wp-content/uploads/2015/11...

10:03 Dec 28, 2020 

I cannot believe they would use a slip-knot for such a purpose — and it's most certainly not the same thing as a 'running knot'!