All around us, jobs going wanting. But it couldn't just have been pandemic unemployment benefits and low wages keeping workers in dry dock, because a host of high-paying jobs have gone unfilled for a very long time.
Not only do they have this technology now, they also have it in underwater applications because super tankers, super tankers cannot dry dock after they've been launched.
And then the final stage is just a brief spell in a dry dock, just to finish off the hull of the ship, to paint it, final bits of electrics and plumbing and that sort of thing.
There is also evidence of a drydock at Lothal, which seems to have been used as an outpost for sea trade, suggesting the sea was once much closer to the site than it is now.
Built by more than 10,000 workers, the fort was a huge investment and stimulated lots of innovation. In the 1760s, this was the world's biggest and most modern dry dock.
Those manufactured on the Chioggia side were constructed in a dry dock, which was filled with water, causing the finished structures to become almost buoyant.
Tennessee, moored inboard of West Virginia, and Maryland, inboard of Oklahoma, escaped torpedo damage, as did the fleet's flagship, Pennsylvania, in Dry Dock 1.