below. This illustraion is modified from The Ashley Book of Knots
by Clifford W. Ashley (p. 141 # 787). It is in the category of Two Strand Lanyard Knots. It is often given as token of friendship or recognition by Scouts and Scouters to be worn from the shirt pocket button.
It is also known as the Sailor's Knife Lanyard Knot, Marlingspike
Lanyard Knot, Single Strand Diamond Knot, Two Strand Diamond Knot, and
Bosun's Whistle Knot.
The version used as a friendship knot can be tied in about 9 inches of
small cord about the first two fingers of the left hand . Start with
a longer piece to work out the concept using the whole hand as a tying
The following sequence illustrates the steps.
After completing this sequence remove the knot from the fingers or hand
and grasp the open loop left by the cord from around the fingers with
one hand and using the other hand gently tighten the knot by a slight
pull on the two loose ends. Slack within the knot can be worked
through to improve the uniformity of the knot.