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Aeronautical Charts Terms and Symbols
IFR Aeronautical Charts
Explanation of IFR Terms and Symbols

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Aeronautical Charts
Terms and Symbols

VFR Aeronautical Charts

Explanation of VFR Terms
and Symbols

VFR Chart Symbols

Airports

Radio Aids to Navigation

Airspace Information

Navigational and Procedural
Information

Culture

Hydrography

Relief

Helicopter Route Charts

VFR Flyway Planning
Charts

IFR Aeronautical Charts

Explanation of IFR
Terms and Symbols

IFR Chart Symbols

IFR Enroute Low/High
Altitude
(US and Alaska Charts)

Oceanic Route Charts
North Atlantic and
North Pacific Route Charts


CONTROLLED AIRSPACE
Controlled airspace consists of those areas
where some or all aircraft may be subjected to air traf-
fic control within the following airspace classifications
of A, B, C, D, & E.

Class A Airspace is depicted as open area
(white) on the Enroute High Charts. It consists of airspace
from 18,000 MSL to FL600.

Class B Airspace is depicted as screened blue
area with a solid line encompassing the area.

Class C Airspace is depicted as screened blue
area with a dashed line encompassing the area with a
following the airport name.

Class B and Class C Airspace consist of controlled
airspace extending upward from the surface or a
designated floor to specified altitudes, within which all
aircraft and pilots are subject to the operating rules and
requirements specified in the Federal Aviation Regulations
(FAR) 71. Class B and C Airspace are shown in
abbreviated forms on Enroute Low Altitude charts. A
general note adjacent to Class B airspace refers the
user to the appropriate VFR Terminal Area Chart.

Class D Airspace (airports with an operating
control tower) are depicted as open area (white) with a
following the airport name.

Class E Airspace is depicted as open area
(white) on the Enroute Low Charts. It consists of airspace
below 18,000 MSL.

UNCONTROLLED AIRSPACE

Class G Airspace within the United States extends
to 14,000' MSL. This uncontrolled airspace is
shown as screened brown.

Air Route Traffic Control Centers (ARTCC) are
established to provide Air Traffic Control to aircraft operating
on IFR flight plans within controlled airspace,
particularly during the enroute phase of flight. Boundaries
of the ARTCCs are shown in their entirety using
the symbol below. Center names are shown adjacent
and parallel to the boundary line.

ARTCC sector frequencies are shown in boxes
outlined by the same symbol.

SPECIAL USE AIRSPACE
Special use airspace confines certain flight activities
or restricts entry, or cautions other aircraft operating
within specific boundaries. Special use airspace
areas are depicted on aeronautical charts. Special use
airspace areas are shown in their entirety, even when
they overlap, adjoin, or when an area is designated
within another area. The areas are identified by type
and identifying number or name (R-4001), effective altitudes, operating time, weather conditions (VFR/IFR)
during which the area is in operation, and voice call of
the controlling agency, on the back or front panels of
the chart. Special Use Airspace with a floor of 18,000'
MSL or above is not shown on the Enroute Low Altitude
Charts. Similarly, Special Use Airspace with a ceiling
below 18,000' MSL is not shown on Enroute High Altitude
Charts.


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