With a Bowline on a Bight hookup, which secondary knot is used?

• A. Double Overhand Safety Knot
• B. Figure Eight Follow Through
• C. Overhand Knot
• D. Square Knot

Answer: (A)

A backup safety knot is used to keep the Bowline on a Bight from sliding or coming undone when loaded. The Double Overhand Safety Knot fits this role because tying two turns around the standing part creates a tight, reliable stopper that locks the end in place. The extra turns increase friction and prevent the tail from slipping back through the main knot, while still letting the loop stay compact and easy to untie later. The other knots serve different purposes or don’t provide the same level of security for a Bowline on a Bight hookup: the Figure Eight Follow Through is a different tying method used for harnesses and fixed anchors, the Overhand Knot is a simpler stopper but less secure under load, and the Square Knot is for joining two rope ends, not backing up a loop hitch.