BOWLINE ON A BIGHT . . Bowline On A Bight How to tie the Bowline on a Bight Knot. This knot forms a bowline (secure loop) in the middle of a line. Useful when you want a non-slip loop but a free end is not handy or to provide two loops in the end of a line. This knot can be used as a sling or as a seat or bosum's chair in an emergency rescue situation. The two loops can be worked to different sizes if needed. . #petzl #cordiste #iratainternational #rope#climb #firefighter#magmaequipos #roperescu