This knot is often used by Scouts to secure the neckerchiefs, instead of a woggle - either because they've lost it - or because they're worried they might. It can also be tied in the points of a necker (very small) if a woggle is being worn.
The linking of the two sides of the necker represent the bond of friendship - both sides of the knot collapse to nothing if they are disentangled.
|(1) First cross the two ends of the neckers||(3) Now pass the other end behind the bight||Finished friendship knot - looks smarter in a Halved necker, and if you fold the bights|
|(2) Then make a bight with the end that went over, and tuck it back under the other end||(4) Finally tuck the end down the bight|