Almost made another comment correcting myself, should have said "money & machine tools" - my default is just to take money out of the equation when trying to explain things, but here the point was really to talk about what money enables.
Discussion
But the machine tools (and ability to save & acquire them) are what make boat & winch & hoist production possible.
It's layers & layers of specialization & innovation & production enabling lots of real savings (capital accumulation) that enable the extension of the key areas of production that enabled the savings in the first place.