Cheap and easy kelp line/ tail line
I simply hook the carabiner to my anchor trolley and put the loop around kelp and tighten also can be used for a tail line on bigger fish or sharks....this taut line knot is the key because you can put heavy load on the knot and still simply move it... Video blow shows the knot
Watch "How to Tie a Taut Line Knot" on YouTube
How to Tie a Taut Line Knot:
http://youtu.be/Rv2GhpeXav8