Page 86 - Gibson W.B. "The complete guide to knots"

78
Jury Mast Knot

Working from left to right, form
an overhand loop ("X") with the left
hand. Continue and form another
overhand loop ("Y") with the right
hand. Hold these so that the left loop
("X") slightly overlaps the right loop
(fig. 1).
Let these loops lie loosely on the
hands which are palms up, fingers tip
to tip. Dip the left thumb and fore-
finger down through "X" and grip the
left side of "Y." Work the right
thumb and forefinger up through "Y"
and grip the right side of "X" (as
shown by the arrows in fig. 1). Pull
the hands apart and the knot is
formed (fig. 2).
It gains its name from the fact that
it was used to rig a temporary "jury"
mast, the center being placed over the
top of the mast and the loops fixed
LAYOUT with guy lines to the deck.

fig. 1