Floyd Bennett Field is an airfield in the Marine Park neighborhood of southeast Brooklyn in New York City, along the shore of Jamaica Bay. The airport originally hosted commercial and general aviation traffic before being used as a naval air station. Floyd Bennett Field is currently part of the Gateway National Recreation Area's Jamaica Bay Unit, and is managed by the National Park Service. While no longer used as an operational commercial, military, or general aviation airfield, a section is still used as a helicopter base by the New York City Police Department, and one runway is reserved for hobbyists flying radio-controlled aircraft.
Floyd Bennett Field was created by connecting Barren Island and several smaller islands to the rest of Brooklyn by filling the channels between them with sand pumped from the bottom of Jamaica Bay.
Wikipedia https://en.wikipedia.org/wiki/Floyd_Bennett_Field
Coordinates 40°35'26.423" N -73°53'30.584" E