The New York City Police Department (NYPD), New York City Department of Sanitation (DSNY), and United States Park Police (USPP) all have their own plots of land on the eastern side of Bennett Field. The IATA airport code and Federal Aviation Administration airfield identifier code was NOP when it was an operational naval air station and later Coast Guard air station, but now uses the FAA Location Identifier NY22 for the heliport operated there by the NYPD. Administration Building The administration building (now the William Fitts Ryan Visitor Center, or Ryan Center) is a 2-story neo-Georgian building set back from Flatbush Avenue with a 4-story observation tower. Ryan Center, which is named after U.S. Representative William Fitts Ryan, serves as the entrance to Floyd Bennett Field, and formerly also served as the airport's passenger terminal and administration building. Ryan Center is partially accessible to the public, including guided visits to the former control tower. Ryan Center is a rectangular building measuring , with the longer side running parallel to Flatbush Avenue. The facade is made of red and black brick. The building has a brick parapet that juts out above its entablature. It also has quoins, a foundation, and a water table made of white stone. The neoclassical details of the building, which can also be found in train stations and post offices built in the early 20th century, were purposely included to give passengers a familiar feeling. At the time, flying was still largely untested and relatively few people had ever flown. The western and eastern elevations are composed of three parts, of which the center portions on both facades project outward. On the west side, which faces Flatbush Avenue, the center portion of the facade consists of an entrance with three recessed bays; the two smaller bays on the sides flank a wider and taller central bay. The bays comprise a symmetrical portico with supporting Ionic columns. As built, a polychrome winged globe, part of the original design, was located at the corner of the portico. A Naval Air Station clock hung above each of the three doorways. The west side of the administration building also contained entrance ramps for passengers, which led to baggage ramps on the east side of the building. During the WPA renovations, the baggage ramps were replaced with four tunnels that allowed passengers to cross under the runways. On the eastern facade, the