Page 153 - Patty Hahne "The Pocket Guide to Prepper Knots"

Possible Uses:
This knot can be used to make tapered leaders so your fly
fishing line can roll out and gently settle on the water with-
out making a splash that might spook fish.

Surgeon’s Knot
This is another useful fishing knot. It’s primarily used for
joining two lengths of line. When tying the surgeon’s knot,
the lines should be fairly close in diameter. The lines can have
slightly differing diameters, but if they are drastically different
you may want to consider using a knot that is better suited
for this purpose, such as the blood knot.

Pros: This is a very strong knot that isn’t generally believed
to weaken the line much. It’s also extremely simple to tie.
Cons: This knot can’t be easily tied in the middle of your
line, therefore it isn’t a good choice for tying on a fairly
long extension of line onto the line that is already on your
reel. It’s also one that results in a knot with a slightly larger
overall diameter than a blood knot that could be tied with
the same two pieces of line.

How to tie it:
Unlike the photographs used to illustrate how to tie the
blood knot, in these photographs the red paracord is used
to represent the longer main fishing line that is connected

Bonus Section: Fishing Knots 147