The Anchor Bend is the boating knot generally used to fasten a line to an anchor. The free end should be secured with seizing to the standing line for a permanent, secure knot. One side of a Double Fisherman's also makes a good backup knot to this and any knot. Make two turns around the shackle, leaving turns open. Talk a half turn around the standing line and feed the free end through the turns and pull tight. Now tie a half hitch around the standing part and pull tight. Seize the free end or tie a backup knot such as double fisherman's with the free end around the standing part. Hopefully this boating knot instructional video will help you improve your skills. Enjoy and pass on to your fellow boaters!