One of the most often used knots to join
2 lines of about the same diameter.
Take the two lines' ends and tie
a simple overhand knot (which will be clipped
off later). Then tighten to combine the two
lines into one.
Form a loop where the two lines
meet, with the overhand knot in the loop. Pull
one side of the loop down and begin taking turns
with it around the standing line. Keep point
where turns are made open so turns gather equally
on each side.
After eight to ten turns, reach
through center opening and pull remaining loop
(and overhand knot) through. Keep finger in
this loop so it will not spring back. Hold loop
with teeth and pull both ends of line, making
turns gather on either side of loop.
Set knot by pulling lines tightly
as possible. Tightening coils will make loop
stand out perpendicular to line. Then clip off
the loop and overhand knot close to the newly
formed knot.