Prohibited airspace

Prohibited airspace refers to an area (volume) of airspace within which flight of aircraft is not allowed, usually due to security concerns. It is one of many types of special use airspace designations and is depicted on aeronautical charts with the letter "P" followed by a serial number. It differs from Restricted airspace in that entry is typically forbidden at all times from all aircraft and is not subject to clearance from ATC or the airspace's controlling body.

According to the USA Federal Aviation Administration (FAA): "Prohibited areas contain airspace of defined dimensions identified by an area on the surface of the earth within which the flight of aircraft is prohibited. Such areas are established for security or other reasons associated with the national welfare. These areas are published in the Federal Register and are depicted on aeronautical charts."

Part of a Terminal Area Chart, showing the prohibited/restricted airspace surrounding Camp David

Some prohibited airspace may be added or expanded via NOTAMs. For example, Prohibited Area 40 (P-40) is often expanded when the President of the United States visits Camp David in Maryland, while normally the airspace surrounding P-40 is restricted, not prohibited.

Violating prohibited airspace established for national security purposes may result in military interception and/or the possibility of an attack upon the violating aircraft, as in the case of Korean Air Lines Flight 007. Aircraft violating or about to violate prohibited airspace will often be warned beforehand on 121.5 MHz, the emergency frequency for aircraft.

No-fly zones as of November 2011

Australia

• The Pine Gap Joint Defence Space Research Facility near Alice Springs is a permanent No-Fly Zone and only authorized military aircraft may approach and enter this area.

Cuba

• Unscheduled foreign aircraft are prohibited from entering or encroaching Cuban airspace including disputed international water zones except when permission has been explicitly given by the Cuban Government. The Cuban military has been known to shoot down and destroy unauthorized aircraft without warning including a 1996 incident in which two U.S.-registered aircraft were shot down and destroyed by Cuban Air Force MiGs.

Hungary

• Budapest (Inner city and Buda Hills)
  • Hungarian Parliament Building, including the heavily protected Holy Crown of Hungary
  • Buda Castle, including Sándor Palace (home to the president and his family)
  • Hungarian National Bank HQ
  • Hungarian National Museum
  • Saint Stephen's Basilica, including the heavily protected Holy Right, the right hand of Saint Stephen (the founder of Hungary)
  • Atomic bunker F4
  • Research reactor of the MTA Central Physical Research Instiute in Buda Hills
• Paks (area around Paks Nuclear Power Plant)
• Bases of the Hungarian Homeland Defence Forces through the country (including Kecskemét Air Base, Pápa Air Base, Szolnok Air Base)
• National parks and holiday resorts (including Lake Balaton and Hortobágy)

India

• The Taj Mahal, Agra, State of Uttar Pradesh, India
• Parliament Building, Prime Minister's residence, and other important centers in New Delhi.
• The airspace around many Defence and Indian Air Force bases are restricted, although new proposals are suggesting opening them up for civilian aircraft.
• The Rashtrapati Bhavan in Delhi.
• The Tower of Silence, Mumbai.
• Mathura Refinery
• Tirumala Venkateswara Temple near Tirupati in Andhra Pradesh
• Bhabha Atomic Research Centre
• A 10-km radius no-fly zone over Kalpakkam nuclear installation, Tamil Nadu. All flying activity up to a height of 10,000 feet over the Kalpakkam area is prohibited.

Israel

• Negev Nuclear Research Center
• Sdot Micha Airbase
• Temple Mount

Pakistan

• Islamabad – The no-fly zone is specifically along Constitution Avenue in North-east Islamabad, where many important government buildings are located:
  • The Parliament Building
  • The Presidency (Residence of the President)
  • The Prime Minister's Residence
  • The Prime Minister's Secretariat
  • The Supreme Court

• Kahuta
  • Kahuta Research Laboratories, Pakistan's main facility for the development of nuclear weapons

• Khushab
  • Khushab Nuclear Complex

Peru

• Machu Picchu

Russian Federation

• City of Moscow — technically, it is just a "P" (i.e. Prohibited) airspace (according to international classification and aeronavigational maps).^{[citation needed]} Many flights are being regularly routed through the outer regions of this airspace.

Sri Lanka

According to Air Navigation (Air Defence) Regulations (No: 1 of 2007) by which skies over territory and the territorial waters of Sri Lanka (except Ruhuna Open Skies Area) has been declared an Air Defence Identification Zone (ADIZ) with Prohibited Areas and Restricted Areas within it. No aircraft may operate in prohibited areas and in restricted areas flight or aircraft will be allowed to operate without valid Air Defence Clearance (ADC) from the Sri Lanka Air Force (SLAF).

Prohibited Areas

• Colombo City

1 Nautical mile centering the Parliament-Sri Jayawardenapura Kotte

Restricted Areas

• Sri Lanka Air Force bases SLAF Anuradhapura, SLAF Minneriya, SLAF Vavuniya, SLAF Palaly and SLAF Sigiriya (5 nautical miles)
• Jaffna town (5 nautical miles)
• Trincomalee harbour (5 nautical miles)
• SLAF China Bay (10 nautical miles)
• The garrison town of Diyatalawa (2 nautical miles)
• Temple of the Tooth, Kandy (2 nautical miles)-Earlier 6 nautical miles
• Home of President Mahinda Rajapaksa, Tangalle (5 nautical miles)

Taiwan

• The area around the Presidential Hall(總統府), Taipei 101, Taipei.
• Parts of the Taiwan Strait
• The area around Nuclear Power Plant in Taiwan.

United Kingdom

• Atomic Weapons Establishment, Aldermaston, Berkshire (nearest town is Tadley, Hampshire)
• Buckingham Palace, the residence of the Queen and members of the Royal Family.
• Flights over Whitehall need extensive clearance.
• Royal palaces and politicians' houses and retreats when royals/diplomats are in residence.
• Some Royal Air Force bases and naval installations.

United States

Prohibited Areas

In the United States, the phrase "no-fly zone" has no legal meaning. What most people would consider a "no-fly zone" is termed by the Federal Aviation Administration (FAA) a "Prohibited Area". Prohibited Areas are permanent until canceled and are published in the Federal Register and at http://sua.faa.gov, and are depicted by blue hashed boundaries on aeronautical charts.

Active Prohibited Areas:

• Thurmont, Maryland, site of Presidential retreat Camp David (Prohibited Area 40 or P-40)
• Amarillo, Texas, Pantex nuclear assembly plant (P-47)
• Naval Submarine Base Kings Bay, Georgia (P-50)
• Naval Base Kitsap, Washington (P-51)
• Washington, D.C., Capitol and White House (P-56); see other restrictions for information about all Active Prohibited Areas in the Washington D.C./Baltimore Flight Restricted Zone.
• Bush compound near Kennebunkport, Maine (P-67)
• Mount Vernon, Virginia, home of George Washington (to prevent vibrations) (P-73)
• Boundary Waters Canoe Area Wilderness in northern Minnesota (P-204, 205, and 206)
• Merritt Island, Florida. All civilian flight operations in and around the island are prohibited due to NASA and U.S. military operations at the Kennedy Space Center and Cape Canaveral Air Force Station.
• Nellis Air Force Base. Also known as "Area 51," The area is part of the Nellis Military Operations Area, and the restricted airspace around the field is referred to as (R-4808N),known by the military pilots in the area as "The Box" or "the Container". [source: http://www.dreamlandresort.com/info/janet_routes.html]

Temporary Flight Restrictions

The FAA may also issue Temporary Flight Restrictions, or TFRs, which are similar to Prohibited Areas but which are typically effective for a few days or weeks, versus the essentially permanent nature of a Prohibited Area. For example, a TFR is typically issued to prohibit flights near the President's destination when he travels outside Washington. TFRs are also issued to ensure a safe environment for firefighting operations in the case of wildfires and for other reasons as necessary. A TFR was quickly issued around the crash site of Cory Lidle's airplane in New York City. Later, a broader TFR was issued to require pilots traveling over the East River to obtain air traffic control clearance.

TFRs are issued by Notice to Airmen (NOTAM), and are available at http://tfr.faa.gov or by calling a Flight Service Station.

There are active TFRs that have been effective since 2003 over Disneyland and Walt Disney World, and an indirect TFR that prohibits flight below 3000' above ground level, and within a 3 nautical mile (5.5 km) radius of a stadium having a seating capacity of 30,000 or more "in which an MLB, NFL, NCAA division one football, major motor speedway event, or a WrestleMania event is occurring" from one hour before to one hour after the event, with exceptions for essentially anyone connected with the event sponsor.

• Disneyland Resort, in Anaheim, California
• Walt Disney World Resort, in Central Florida (near Orlando). The zone extends to 3,000 feet (910 metres) in a 3-nautical-mile (5.6-kilometre) radius centered from the Main Spire of Cinderella's Castle in the Magic Kingdom Theme Park. Though implemented for security according to the FAA, the decision has been controversial. In 2003, a conservative Christian group filed a lawsuit claiming that the ruling infringed on its First Amendment right to fly banners to display to visitors during the unofficial Gay Days at Walt Disney World.

Aviation groups have questioned whether these last TFRs really serve a public need, or the needs of politically connected venue operators. [1] [2] [3] [4]

Other restrictions

In addition to areas completely off limits to civil aviation, a variety of other airspace restrictions exist in the United States. Some notable ones include the Flight Restriction Zone (FRZ) encompassing all airspace up to 18,000 feet (5,500 m) within approximately 15 nautical miles (28 km) of Ronald Reagan National Airport around Washington, D.C. Flights within this airspace, while not entirely prohibited, are highly restricted. All pilots flying within the FRZ are required to undergo a background check and fingerprinting. An additional area encompassing most of the Baltimore-Washington D.C. metropolitan area requires the filing of a flight plan and communication with air traffic control.

See also

• Controlled airspace
• Restricted airspace
• No-fly zone

References

• FAA Aeronautical Information Manual