Shackle hitch for recovery

[landmannnn]

Picture 16 looks like an extension lead after my wife has been using it.

I've got no idea how a tangled mess of rope can produce such a knot.

 

[Logsplitter]

Here’s some pictures of making the loop before making the button knot

 

[Logsplitter]

And finally tapering and burying the tails for the finish.
This is using 10mm SK75 Dyneema and 2.5m of rope per shackle.
The dyneema has a minimum breaking strain of 7900kg and the breaking strain of the shackle will be at least 200% of that, so more than enough for extracting a Grenadier. You still have to consider breaking strains especially if using snatch rings or snatch blocks. If you don’t feel confident in your home made soft shackles, then better buy them.
Happy splicing