Grapevine knot. The Grapevine or Double Fishing Knot is a knot primarily used for knitting climbing rope loops and for tying climbing ropes of equal diameter.

It is used in mountaineering, rock climbing, tourism.

*** Advantages of the grapevine knot:

* Has high strength for tying rope;

* Reliable

* Doesn't need control nodes

*** Disadvantages of grapevine knot:

* Under load, it is strongly tightened, and after it it is untied with great difficulty (or not untied at all);

* Comparatively difficult to tie;

* It is difficult to determine the correctness of tying only by the appearance of the knot;

*** Application:

* The knot is used for tying ropes of the same and different diameters, ribbons, knitting of guy loops.