Richard Shead
Slipped Anchor
Every boat which is either not on a floating mooring, or cannot be checked when necessary (hourly, in some circumstances!!) should come out.
Otherwise there is a risk of sinking.
Now even a Bayliner (Like the one in the photo) would be hard to actually sink even in a rough estuary, so one can only assume it's broken away and hit something very hard or sharp, the thing was tied up too tight, or the Stewrndrive seal wasn't replaced for years.
They don't just sink, but with the right ingredients they will, quite easily.
Firstly its not a Bayliner
You are right they dont just sink but it could be a whole host of things that made it sink! We just don't know.