It keeps the buoy away from the rope so it doesn't get tangled. Technically, the warp is the rope part of the anchor set up (rode). I believe the part you refer to here is called the standoff.
Terry.
Update. Number one daughter, Amanda, has decided that she wants a day on the water to practice her skippering skills learnt a couple of years ago. Although not a club member, this will enable me to come out to play on Sunday. See you all out there.
Terry.
You do realise, as the husband, this is all your fault? Give Jackie my love and tell her to be more careful. A bit superfluous under the circumstances.
Terry.