Page 195 - Geoffrey Budworth & Jason Dalton "The Little Book of Incredibly Useful Knots 200 Practical Knots for Sailors"
        P. 195
     Boa knot
  This beefed-up binding is associated with the British weaver Peter Collingwood, who first
  publicized it for himself in 1996, although others later claimed to have known and used the knot
  at least 10 years earlier. He employed it to bind the ends of braids that had to be cut off close
  alongside the knot itself. It is, as its name implies, related to the constrictor knot (see pages 153–
  154).
  Lay down two matching loops, the second atop the first (1), and spread them into a coil (2). Turn
  the right-hand half of this coil up and away through 180°, or half a circle (3). Insert through the
  two halves of the resulting figure-eight layout what ever is to be seized, going under-over-under
  (4), and then turn the knot over to work it tight (5).





