This knot is excellent for creating a ladder or step up if you need to scrabble up onto the boom or higher. It is also very handy for helping those less flexible to board the yacht from a side-on pontoon. It’s also very good for recovering crew from the water if they are tired or incapacitated in some way.
Each loop can be passed up each arm to the armpit and shoulder. A special application I use this knot for is creating hand and foot holds on a line that we tow crew or my grandkids behind the yacht in flat seas under power.
Lots of fun!