There is no day-shape for hove-to.
Hove-to is sailing. (see previous post #16)
You are also required to maintain a lookout at all times.
Maybe there should be a dayshape for being hove-to. "Restricted maneuverability" was the closest I could get for SOMETHING that would remedy the original poster's problem.
Of course, maintaining a lookout at all times would also do this.
I've posted here before how I was in an equivalent position where, from about a mile away on an otherwise cold and empty Lake Ontario in mid-October, we encountered a 30 footer that was on a nice, straight collision course.
We had about 15 minutes to figure this out.
He was the windward boat, except that "he" was down below, making coffee, I later thought. He was not visible at the helm at any point, but I must say, he'd done a great trimming job in somewhat lively seas. He was close-reaching for shore and we were broad reaching for Toronto from the eastern part of the lake.
It took only the slightest of tiller movements to put us off his stern, and the shadow of our sails broght his head...complete with lips to coffee mug...to the companionway. "Keep a watch, friend!" we said. A horn may have been tooted. The guy probably thought we'd sailed deliberately out to him to give him a fright, rather than to avoid a seemingly improbable collision on a yacht-free lake.
He didn't have a dayshape, either!