Knots, knots and more knots

Every diver must know how to attach a bolt snap to the dive equipment and how to tie a bungee cord to the harness. These knots must be secure but easy to cut with a knife or scissors. In order to do this we must have in our array of knowledge the steps to do a few knots that will help us to have a streamlined and simple equipment.

There is a lot of knots that we might use to configure our equipment, in this article I will focus in what I consider more useful and clean.

Fisherman Knot

This is a very common knot and very easy to do, it can be used with nylon cord or bungee cord.

For details about how to do the knot visit the following link: Fisherman Knot.

In the next picture we can see an example of the fisherman knot used to tie a bungee cord to the webbing harness.

Constrictor Knot

This knot can replace the plastic cable tie when we want to form a loop with a thick bungee cord, it’s also a better option than the fisherman knot when used with thick bungee because the knot is smaller.

In the previous picture we can see an example of the constrictor knot used for creating a loop with thick bungee, the knot was made with nylon cord of 1.5 mm.

For more information about how to do the constrictor knot visit the following link: Constrictor Knot.

Figure Eight Knot

This knot can be used as a stopper knot, in the next picture we can see the knot made with nylon cord, the bolt snap is used as part of the kit for a decompression stage cylinder or a side mount cylinder.

For more information about how to do the knot visit the following link: Figure 8 Knot.

Overhand Loop Knot

In the following link we can see how to make an Overhand loop knot. This knot is used primary to make a loop at the end of the line of a spool. In the next picture you can see a spool with two overhand loop knots, the first to create the primary loop and the second is for having a small loop at the end in order to make the handling of the line easier with thick gloves.

DIR Knot

Because I don’t know the real name of this knot I’m going to use the only name that I know for the moment. The DIR knot is very useful to tie a bolt-snap to a low or high pressure hose and also to tie a bolt-snap to a torch. It is composed of a half knot and a square knot. The following pictures show the DIR knot used on a small torch.

These are the steps to make a DIR knot.


  • A rope, in this example a 1.5 mm nylon cord was used.
  • A cutting device.
  • Fire to burn the ends of the line.
  • A bolt-snap.
  • And in this case a torch.

Pass the rope through the torch.

Pass the rope through the bolt-snap.

Repeat a second time.

Repeat a third time.

Tighten the rope in order to get the bolt-snap and the torch together.

Make a half knot.

Point the ends of the rope in order to form a perpendicular angle with respect to the bolt-snap.

Turn the bolt-snap and the torch in order to see the other side of the knot.

Make a half knot.

Complete the knot with an inverted half knot in order to form a square knot.

Cut the excess of rope.

Burn the ends of the rope.

Final result.

Some examples

Two constrictor knots, one to make a loop with the bolt-snap and the the other to make a loop to pull the bungee cord and also to act like a stopper for the markers.

A constrictor knot to form a loop with the bungee cord, used with a side mount wing.

Spool and bolt-snap together, knots in the next pictures.

Two overhand loop knot, one for the primary loop and other for the end. Details in the next pictures.

Detail of the overhand loop knot used with the primary loop.

Detail of the overhand loop knot used at the end of the rope of the spool.

Kit for stage or side mount cylinder. A bolt-snap with a figure eight and another with a fisherman knot.

To the left a fisherman knot and to the right a figure eight knot.

Bungee cord to secure the corrugated hose of the wing to the harness. A constrictor knot was used in the white bungee cord.

Detail of the constrictor knot.

Detail of the constrictor knot without the corrugated hose.

Detail of the fisherman knot used in the black bungee cord. The bungee cord was used to replace a metallic piece to secure the white bungee.