IFR low- and high-altitude enroute chart legends, symbols, examples, and procedures.
That airspace from the surface to 10,000’ MSL (unless otherwise designated) surrounding the nation’s busiest airports. Each Class B airspace area is individually tailored and consists of a surface area and two or more layers.
A Solid Blue Outline
That airspace within 30 NM of the primary airports of Class B airspace and within 10 NM of designated airports. Mode-C transponder and ADS-B Out equipment is required. (See FAR 91.215)
Class B airspace example near Salt Lake City, Utah — source page 89.
AIRSPACE INFORMATION (Continued) Airspace - U.S. Class A High Chart Only Controlled Airspace Class B Low Chart Only Controlled Airspace Mode C Area Low Chart Only Controlled Airspace Open Area (White) That airspace from 18,000’ MSL to and including FL 600, including the airspace overflying the waters within 12 NM of the coast of the contiguous United States and Alaska and designated offshore areas, excluding Santa Barbara Island, Farallon Island, the airspace south of latitude 25° 04’00” N, the Alaska peninsula west of longitude 160°00’00” W, and the airspace less than 1,500’ AGL. That airspace from 18,000’ MSL to and including FL 450, including Santa Barbara Island, Farallon Island, the Alaska peninsula west of longitude 160°00’00” W, and designated offshore areas. Screened Blue with a Solid Blue Outline M ODE C & ADS-B OUT 30 NM 30 NM MODE C & ADS-B OUT That airspace from the surface to 10,000’ MSL (unless otherwise designated) surrounding the nation’s busiest airports. Each Class B airspace area is individually tailored and consists of a surface area and two or more layers. A Solid Blue Outline That airspace within 30 NM of the primary airports of Class B airspace and within 10 NM of designated airports. Mode-C transponder and ADS-B Out equipment is required. (See FAR 91.215) Example: MODE C & ADS-B OUT M ODE C & ADS-B OUT Example: See Chart example above.
Source page 90
AIRSPACE INFORMATION (Continued)
Airspace - U.S. (Continued)
CLASS C
CLASS D
Screened Blue with a Solid Blue Dashed Outline
Class C schematic — Boise Air Terminal/Gowen Field — source page 90.
That airspace from the surface to 4,000’ (unless otherwise designated) above the elevation of selected airports (charted in MSL). The normal radius of the outer limits of Class C airspace is 10NM. Class C airspace is also indicated by the letter C in a box following the airport name.
Class D airport-data example — Hagerstown Regional (HGR) — source page 90.
That airspace from the surface to 2,500’ unless otherwise designated) above the airport elevation (charted in MSL), surrounding those airports that have an operational control tower. Class D airspace is indicated by the letter D in a box following the airport name.
Class C airspace example near Boise, Idaho — source page 90.
Class D airspace example near Hagerstown, Maryland — source page 90.
CLASS C Low Chart Only Controlled Airspace CLASS D Low Chart Only Controlled Airspace Screened Blue with a Solid Blue Dashed Outline That airspace from the surface to 4,000’ (unless otherwise designated) above the elevation of selected airports (charted in MSL). The normal radius of the outer limits of Class C airspace is 10NM. Class C airspace is also indicated by the letter C in a box following the airport name. Open Area (White) That airspace from the surface to 2,500’ unless otherwise designated) above the airport elevation (charted in MSL), surrounding those airports that have an operational control tower. Class D airspace is indicated by the letter D in a box following the airport name. Example: Example: AIRSPACE INFORMATION (Continued) Airspace - U.S. (Continued)
Source page 91
Airspace Information (Continued)
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