What is the issue?
General purpose knots can float loose if jostled about lightly loaded. This is a concern when securing a warp to the anchor or a ground tackle chain.
Why address this?
If the knot securing the vessel’s ground tackle comes lose the vessel could be lost. For this reason it is worth adding a specialist knot to your repertoire.
How to address this?
Learn the fisherman’s bend or anchor bend as it has commonly came to be known as presented in figure 1 and 2.
It is very simple knot and very similar to the round turn and two half hitches except that the first half hitch is passed under the turn. However it is much more secure and will not jam or slip under strain. It tends to bite in steadfastly tight after being loaded up so it is often difficult to undo. For this reason it has become the accepted knot for attaching anchors or anchor chains to warps where knots have to be totally reliable and are only occasionally undone.
Because it is very similar to the round turn and two half hitches it is easy to learn and well worth acquiring the knack. It also offers great peace of mind in situations where you have to depend upon the security of a knot.
Contributor:
Michael Harpur, Yacht Obsession.

