This mast has been sticking up for a couple of years now, half way between Brisbane and the Gold Coast. What is interesting is the absolute perpendicular attitude! It was either a bilge keeler or sank at just the right angle.
Yeah, I motored past that one in my brother's tinny while out fishing about two years ago. Seems no-one bothered to find the owner and have it removed. Curious that it apparently hasn't been molested for bits by now.