Question: Petersburg James A. Johnson Airport and Nantucket Memorial Airport, are which specific type of airport?
Context: Rectrix Aviation is a jet charter and commuter airline service that primarily serves New England, Florida and the east coast.  Its commercial operations are based out of Nantucket Memorial Airport and Barnstable Municipal Airport in Nantucket, MA and Hyannis, MA, respectively.  The only commercial flight it operates is between Nantucket and Hyannis.  Rectrix Shuttle, the commuter service, was founded when Island Airlines of Nantucket shut down. John F. Kennedy Memorial Airport (IATA: ASX, ICAO: KASX, FAA LID: ASX) is a city and county owned public use airport located two nautical miles (4 km) southwest of the central business district of Ashland, a city in Ashland County, Wisconsin, United States.  It is also known as JFK Memorial Airport. Waukegan National Airport (IATA: UGN, ICAO: KUGN, FAA LID: UGN) is a public use airport located in Waukegan, a city in Lake County, Illinois, United States.  The airport is 35 nmi north of the central business district of Chicago.  It was originally named Waukegan Memorial Airport.  It has been operated by the Waukegan Port District since 1956 and is the second busiest airport in Illinois for international arrivals.  In January 2014 under a FAA reclassification of the airport and many others smaller airports across the United States, the airport was renamed Waukegan National Airport Alexander Memorial Airport (FAA LID: GA2) , also known as Peach State Aerodrome or Candler Field, is a public grass strip located 1 mile (1.6 km) west of Williamson, Georgia, in the United States.  Alexander Memorial Airport is located in picturesque rural Pike County, 27 nautical miles (50 km) south of Hartsfield-Jackson Atlanta International Airport. Wiley Post–Will Rogers Memorial Airport, (IATA: BRW, ICAO: PABR, FAA LID: BRW) often referred to as Post/Rogers Memorial is a public airport located in Utqiaġvik, a city in the North Slope Borough of the U.S. state of Alaska.  The airport is owned by the state.  Situated on the Chukchi Sea at a latitude of 71.29°N, the airport is the farthest north of any in US territory.  The airport is named after American humorist Will Rogers and aviator Wiley Post, both of whom died about 9 mi away at Point Barrow in a 1935 airplane crash. Neutrophil swarming is a specific type of neutrophil migration behaviour characterised by a high coordination between neutrophils, clustering of neutrophils to the inflammation site and signalling to other neutrophils further away.  This specific type of migration rely on the production and secretion of LTB4 and on the use of integrins for neutrophil to stop at the cluster site. Petersburg James A. Johnson Airport (IATA: PSG, ICAO: PAPG, FAA LID: PSG) is a state owned, public use airport located one nautical mile (2 km) southeast of the central business district of Petersburg, a city in the Petersburg Census Area of the U.S. state of Alaska which has no road access to the outside world.  Airline service is subsidized by the Essential Air Service program. Northeast Airlines Flight 258 was a scheduled domestic passenger flight from New York's La Guardia Airport that crashed while trying to land at Nantucket Memorial Airport, Massachusetts, at 11:34 on the night of August 15, 1958.  All three crew-members and 22 of the 31 passengers were killed, among them Gordon Dean, former chairman of the United States Atomic Energy Commission. Nantucket Memorial Airport (IATA: ACK, ICAO: KACK, FAA LID: ACK) is a public airport on the south side of the island of Nantucket in the U.S. state of Massachusetts.  The airport is owned by the Town of Nantucket and is located three miles (5 km) southeast of the town center.  It is the second-busiest airport in the state, after Logan International Airport due to intense corporate travel to and from the island in the busy summer months. Friedman Memorial Airport (IATA: SUN, ICAO: KSUN, FAA LID: SUN) is a city-owned public-use airport in the northwest United States, located one nautical mile (2 km) southeast of the central business district of Hailey, the county seat of Blaine County, Idaho.  The airport is operated by the Friedman Memorial Airport Authority under a Joint Powers Agreement between the city of Hailey and Blaine County.  It serves the resort communities of Sun Valley and Ketchum, and the surrounding areas in the Wood River Valley.
Answer: public