Me, too. I think it's a magnetic towel rack or hangar. Try sticking it
to
the steel on the stove...unless the stove is stainless steel, which isn't
magnetic.

Actually my former* home cooktop was magnetic, 400 series I suspect. You
might take a magnet with you next time you're on the boat and check it. I
would hope it's 316 (non-magnetic) but would be curious if it isn't.
BF

* cooktop is now glass, definitely not magnetic