You need to hold the boat off the chain, or put up with the chafe. Sometimes you get tide rode
, sometimes wind
If it's a tidal flow, a drogue
off the stern will keep you aligned with the current
, but, of course, doesn't help much if the wind
that's blowing you over your chain is strong.
Sometimes, you can spring your stern around by using a line from your anchor rode (rolling hitch) to your aftmost winch
, and winch
the stern around, but that only works when the wind stays from the same direction. [This technique can work to keep you bow or stern into the swell in an otherwise rolly anchorage.]
Actually, we generally try to avoid wind over tide situations, because we don't like the chafe nor the hassle of using a kedge. Sort of embarrassing to admit, but true.