You will need these knots in any situation! 11 secret knots

[@QuantumMechanic_88]

Nicely demonstrated and Thanks.

[@marcogarcia-z5k]

Tremendo

[@mikeguy9668]

A siberian hitch replaces all of these

[@MukeshKumar-jw6ji]

I think no 5 & no 10 knots can be used to come down from the tree and the knots can be opened to retrieve rope.

[@eddytanzil7054]

كيف نشد حبلا بين وتدين