Statement of Significance (as of designation - December 20, 1989):
The 1936 Lightship No. 112, known by her last official designation, Nantucket, outlasted all other lightships assigned to that station, having marked it for 39 years. The Nation's most significant lightship station for transatlantic voyages, Nantucket, established in 1854, marked the limits of the dangerous Nantucket Shoals and the eastern end of the Ambrose shipping canal into New York harbor. She was the last lightship seen by vessels departing the United States, as well as the first beacon seen entering the country.