The folks at Trouts Fly Fishing in Denver have launched an educational video series hosted by director of education and guide Courtney Despos–who appeared on Tom Rosenbauer’s podcast a couple years ago–who walks you through some of the basic skills required to get started in fly fishing. Here, she teaches you how to create a a double surgeon’s knot, which allows you to connect two pieces of monofilament or fluorocarbon of different diameters. It’s a great knot for adding tippet to the end of a leader.

Um, that’s a regular surgeon’s knot, not a double. If only one turn were used, it would be a simple overhand knot- and “knot” very strong.
Chuck
The best (easiest, fastest, strongest) tippet splicing knot available is the relatively new Infinity tippet knot.
It’s a figure-8 configuration similar to the Orvis tippet knot but just that much faster and easier to tie, especially under on-stream conditions. Give it a try and you’ll never look back.
Good job!