Found an old photograph (but not the negative, unfortunately) of the remains of the old shipyard launching ramp from 1966 and the same spot in 2011 re-purposed as the Pembroke Town Landing on the North River.
In 1966 there is an dingy being rowed in by my father, our 17′ Amesbury Skiff is moored in the river behind him. You can see the rails going down to the water and an old cradle which at that time was still in service.
1966 is so long ago that a citizen could go boating without the state trying it’s best to rob them blind.
Update: I’m adding a photo from 2011 of the Herring River in Scituate in response to the comment from Will.
This what you mean? Can you see the bank of the river under the surface of the water?