Before it entered the framework, wood blocks were put where the hull would rest and be supported. One of the boatyard crew used a looky bucket (bucket with glass in the bottom) in a skiff, to watch and see if the placement was right. Occasionally a diver is needed to go in the water to adjust the supports.
Finally the boat was in just the right spot and the engine that runs the trolley hoist was fired up, dragging it up the ways.
No time was wasted and immediately work commenced with ladders for access placed next to the boat.