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All 17 knot tying cards are completely waterproof, so you can count on them in case of emergency. Each card uses visual and easy to follow instructional techniques for fast learning and memory retention. Learn how to tie the following knots: Bowline, Tautline Hitch, Square Knot, Water Knot, Buntline Hitch, Bowline on a Bight, Mooring Hitch, Butterfly Knot, Figure Eight, Truckers Hitch, Double Fishermans, Sheet Bend, Prusik Knot, Constrictor Knot, Clove Hitch, Half Hitch.