Depicting the construction of the yard's drydock #1, which was then nearing completion in 1849. Work on it had begun in 1847. According to the account published with this engraving, the dock could accept ships up to 350 feet long, 66 feet in beam, and 26 feet in draft.
Engraving from the Illustrated London News of 27 October 1849. Photo from the New York Naval Shipyard collection, 1966
Naval History and Heritage Command