This heel is a variation on a regular heelflap-and-gusset, modified for my dad. He tends to wear holes in the bottom of his socks first, so the bulk of the reinforcing is placed there. It’s named with his sailing hobby in mind. This toe-up version of the heelflap-and-gusset also includes reinforcing on the heel turn and the center of the gusset.

NOTE: The brown/blue/green handspun sock pictured does not match the called-for gauge. It’s the 62-st size, but with larger needles and thicker yarn.