Re: very strange yacht protuberance
It is for picking up clandestine packages that are fastened to floating lines? The way pirates in junks used to use the bow bulges on tankers to get picked up by the lines they stretched between them. DON'T ASK! (Not me, THEM!)
Or a preemptive lobster pot defender. Get them by the bow before they can foul the rudder or the prop. Off center made attachment easier in the narrow bow.