Bowline on a Bight

Bowline on a Bight

Bowline on a Bight

Bowline on a bight (referenced in The Ashley Book of Knots) creates a secure loop in the middle of a length of rope. It is a variation of the bowline knot that looks similar but is made with a single strand of rope. If you want to make a dependable loop when neither end of the line is available, this is one knot you can vouch for.

When tied to a climbing harness its ability to easily untie after a severe fall makes it score above the figure eight knot. However, it should be protected further with powerful backup knots with long tail ends when used such.

How to Tie a Bowline on a Bight

Bowline on a Bight Knot Instructions

Bowline on a Bight Knot Instructions



  • Easy to tie
  • Does not slip or bind
  • Non-jamming
  • Might slip when only one of the ropes of the loop is loaded


  1. Forms a secure toe-hold at the middle of a rope while climbing.
  2. To make an emergency Bosun’s chair.
  3. Commonly used as a seat for hoisting purposes.
  4. The double loop distributes the load making it popular among cavers.
  5. Allows a free-hang descent. Can be easily adjusted to avoid rub points and waterfalls.
  6. To gain additional purchase.

How to Tie a Bowline on a Bight Step by Step

  1. Form a loop by passing the end of a bight over the standing part
  2. Pull it out through the loop thus formed
  3. Open up the bight and bring it round the entire knot
  4. Continue to bring it up till it encircles the standing ends
  5. Hold the standing part and pull the loop downwards to tighten

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