The marine environment is a hostile one. Fouling and corrosion are constant threats, and while naval engineers have gotten very good at dealing with them, some of the techniques require that they can work on the exposed hull free of water. Initially, this was done by simply running the ship up on the beach and waiting for the tide to go out. Later, as the galley developed in the Mediterranean, facilities were built to help with this process, most notably specialized ship sheds where galleys could be hauled out on ramps and allowed to dry out under cover when not in use.

Iowa in drydock, 1984
But this only worked so long as ships were small enough to stand the stresses of being beached, and during the Hellenistic era, galleys began to grow, and the Greeks developed the first drydocks. The basic concept was simple enough: a big pit was dug next to the sea, with a door of some sort that could seal it off after a ship had been brought in. The water would then be pumped out, allowing it to be worked on in the dry. Information on ancient drydocks is fragmentary, as they were large and expensive, and like so much of the infrastructure of naval warfare in the Mediterranean appear to have died out after the Roman Empire unified the entire area. Read more...







Recent Comments