Double Diamond Knot Sea Terms An ornamental knot worked with the strands of a rope and used on man-ropes, etc. (See engraving.) Racking, seizings, bends and fancy knots — round seizing, cat's-paw, running bowline, worming, diamond knots, sprit-sail sheet knot, two half-hitches, topsail halyard bend, shroud knots and midshipman's hitch ← Double BlockAll “D” entriesDouble Star →