Shape up

Once connected to the keel, the ribs are only fastened by nails: that is to say, they are not really fastened, they can rotate or loosen, anc cannot play any structural role. Now a whole set of structures will be build around them, to connect them to each other and to the keel, in a way that no part will have to endure any stress only by itself.

Meanwhile, they must be locked in position, shaping up the hull as depicted in the 1919 blueprint.
By accurate measurements, the waterlines are transferred from the "garbi" to the ribs, and the latters are locked to long wooden strips, then nailed into them.
The rigid and symmetric skeleton has to be locked in a perfectly leveled position, according to the cave slope, with its vertical axis exactly plum-lined, propped up and fastened. In that position, it will be possible to work freely to remaining frames, and to the planking.