"Developed Area", and the "Administrative Area". It also created the new William Fitts Ryan Visitor Center within the former administration building. In 1980, many of the airport's structures were listed on the National Register of Historic Places. In its early years as a park, Floyd Bennett Field had very few visitors. According to a 1991 estimate, about 30 people visited the park on an average day. The field's chief park ranger at the time attributed the low visitor count to several factors, including "the chain-link fence along Flatbush Avenue, the Coast Guard station and the guardhouse". The park was relatively unknown even to people who lived nearby. 1990s In 1988, the NPS started seeking plans for private developments at Floyd Bennett Field. Many of these plans, including those for condominium housing and an amusement park, were dismissed. By the 1990s, the NPS began looking for commercial tenants to occupy the deteriorating hangars. In approximately 1996, Bennett Field received an allocation of funds, which it used to improve parking access in front of the Ryan Center. In 1997, the 6th Communication Battalion of the United States Marine Corps Reserve moved onto the south side of Bennett Field. The next year, CGAS Brooklyn was decommissioned following its merger with CGAS Cape May, New Jersey, and relocation to the new Coast Guard Air Station Atlantic City, New Jersey. The majority of former Coast Guard land then transferred to the National Park Service. A small portion remained in the possession of the Coast Guard's parent agency at the time, U.S. Department of Transportation, so the Federal Aviation Administration (FAA) could use it. The NYPD moved their aviation operation from a hangar to the former Coast Guard Air Station facilities shortly afterward, under agreement with the NPS. The New York City Department of Sanitation (DSNY) also moved into Bennett Field by the late 1990s, using the runways as a location for truck-driving practice. In 1999, a Doppler radar tower for recording wind shears was placed at Bennett Field for use by nearby JFK Airport. The $6 million tower was controversial, as residents protested that the tower was visually unattractive. In September 1999, the Department of the Interior granted the FAA permission to erect the radar at Bennett Field on the condition that the radar be torn down in 20 years. If a less disruptive radar was developed before then, the tower at Bennett Field had