What is "wall knot"

Wall \Wall\, n. (Naut.) A kind of knot often used at the end of a rope; a wall knot; a wale.

Wall knot, a knot made by unlaying the strands of a rope, and making a bight with the first strand, then passing the second over the end of the first, and the third over the end of the second and through the bight of the first; a wale knot. Wall knots may be single or double, crowned or double-crowned.

n. A knot made by unlaying the strands of a rope, and making a bight with the first strand, then passing the second over the end of the first, and the third over the end of the second and through the bight of the first.