Airspaces (Class A – E)
Special Use Airspaces
Acronyms and Definitions
Competition for Airspace
Wilderness Airspace
100

The dimensions of Class A airspace 

18k-60k MSL

100

ADIZ definition

Air Defense ID Zone around US borders

100

SCATANA

Security Control of Air Traffic and Air Navigation Aids 

100

Allocation regulations subject to

APA

100

Altitude above surface over wilderness areas

No lower than 2000 feet
200
Shape of Class B

Upside down wedding cake

200

MTR

Military Training Routes for high speed flight below 10K feet MSL

200

APA

Administrative Procedure Act

A court may set aside the agency’s decision and remand the matter to the agency for reconsideration in accordance with proper procedure

200

APA requires

Publish a proposed regulatory change as a Notice of Proposed Rulemaking 

200

Banned from launching and landing within National Parks

Drones

300

Purpose of Class C airspace

Protecting aircraft using medium-sized commercial airline airports

300

Purpose of alert areas

To alert pilots of high volumes of pilot training 

300

NPRM

Publish a proposed regulatory change as a Notice of Proposed Rulemaking

300

APA also requires

Provide a reasonable opportunity for public comment before adoption

300

Need 2000 foot clearance

National Parks

National Monuments

National Seashores

National Recreation Areas

400

Purpose of Class D airspace

Protecting traffic at smaller airports having air traffic control towers

400

Purpose of a MOA

Military operations areas notify pilots of areas where the armed forces regularly conduct operations

400

SFRA

Special Rules Flight Area

400

APA ALSO requires

May first issue an Advance Notice of Propose Rulemaking (ANPRM)

400

Also Need 2000 foot clearance

Scenic Rivers (per the National Park Service)

National Wildlife Refuges

Big Game Refuges

500

Dimensions of Class E airspace

Below FL 180

500

Purpose of prohibited areas

Established for national security reasons

500

TFR

Temporary Flight Restriction

500

Competition can originate from

the FAA

500

Also need 2000 feet clearance

Game Ranges

Wildlife Ranges (per the US Fish and Wildlife Service)

Wilderness and Primitive Areas (per the US Forest Service)

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