Four graving docks were also formed, opening out of the first (Upnor) basin.
There are two large fish-docks, and, for general traffic, the Royal dock, communicating with the Humber through a tidal basin, the small Union dock, and the extensive Alexandra dock, together with graving docks, timber yards, a patent slip, &c. These docks have an area of about 104 acres, but were found insufficient for the growing traffic of the port, and in 1906 the construction of a large new dock, of about 40 acres' area and 30 to 35 ft.
Depth of water, and floating and graving docks.
By rail) though incapacitated by its site from growing into a large town, is more readily accessible for shipping, and has extensive piers and a graving dock.
In 1880 the graving dock accommodation consisted of one double dock at the extremity of Dockyard creek, known as Nos.