SummaryMap and diagram of currents around Middle Ground Shoal at head of Gowanus Bay. Note under title: … represent[s] the mean velocities of ebb and flood currents. On top left margin: No. 22. Similar to maps 1849-02-01 and 1853-01-01.
PublisherUnited States Coast Survey
SubjectNautical charts--New York (State)--New York