How to tie a Good Luck Loop - from http://www.SelfMadeSailor.com - A decorative yet strong way of forming a loop in the end of a rope. This knot can be difficult to untie after tension has been applied, but it's good looks (it has the characteristic square shape of the Japanese or Square Knot) go a fair ways toward making up for that shortcoming.
In Portugal we call to that knot the "friendship knot" :)
jorgebarros20 2 years ago