The Surgeon's Knot
Surgeon's Knot
The Surgeon's Knot is a very strong knot that is used to attach two lines together.
Here's how to tie the Surgeon's Knot:
-

Lay line and leader parallel, overlapping 6" to 8". -

Treating the two like a single line, tie an overhand knot, pulling the entire leader through the loop. -

Leaving the loop of the overhand open, pull both tag end of line and leader through again. -

Hold both lines and both ends to pull knot tight. Clip ends close to avoid foul-up in rod guides.