Page 89 - Mario Bigon "The Morrow Guide to Knots"

JURY MAST KNOT

This knot, also known as the
masthead knot, is useful to
sailors as an emergency
measure to rig a jury mast.
The central loop is dropped
over the mast and the shrouds
and stays are fixed to the
other three loops by sheet
bends.

Method
Make a turn to form the
central loop (1). Twist your
hand counterclockwise to
form the left side loop (2) and
clockwise to form the right
side loop (3). Lace the left
loops through the central
loop, sliding it first over and
then under the left edge of
that loop. Slide the right loop
under the right edge of the
central loop (4, 5). The result
should look like figure 6. Be
sure all crossings are as
illustrated. Take hold of the
innermost loop by passing the
index and middle finger of the
right hand under then over
the turns and the left hand
over then under the turns (7,
8). Continue to pull sideways
to form the two side loops.
Pulling the central loop finally
tightens the whole knot (9).

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