Ship graveyard

This morning we visited South Alloa for a little while and I took this shot looking across the Forth towards Alloa Insh.
There used to be a farm on the Inshore but it is long abandoned and the old farmhouse is gradually decaying away.
As also are several old vessels of various types and sizes. These two are well gone and may not be there in another couple of years, while a couple of others don't look to have much wrong with then at all. Wonder why they just hauled them over there and left them?